Alternatives to EmailSuccess
Compare EmailSuccess alternatives for your business or organization using the curated list below. SourceForge ranks the best alternatives to EmailSuccess in 2026. Compare features, ratings, user reviews, pricing, and more from EmailSuccess competitors and alternatives in order to make an informed decision for your business.
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1
Greatmail
Greatmail
Dependable cloud based email hosting with spam filtering, antivirus protection, generous storage and webmail. Compatible with Outlook and all other POP3/IMAP clients. High volume SMTP service for responsible senders. Outbound relay service for transactional messages, email marketing campaigns, newsletters and other applications. Dedicated email servers, clustering and multiple IP load balancing for high volume senders. Fixed monthly cost with unlimited sending and reputation monitoring. Greatmail is an email service provider (ESP) specializing in business class email hosting, SMTP hosting and email servers. For ISPs, application programmers and cloud developers, we also provide custom solutions including dedicated IP servers and process specific, load balanced configurations with multiple servers. -
2
SendGrid
Twilio SendGrid
Email is the backbone of your customer engagement. The Twilio SendGrid Email API is the email service trusted by developers and marketers for time-savings, scalability, and delivery expertise. Our flexible Email API and proprietary Mail Transfer Agent (MTA), intuitive console, powerful features, and email experts make it easy to ensure all your email gets delivered in seconds and without interruption. Monitor engagement data and optimize deliverability with our Deliverability Insights dashboard. Whether you’re sending 100 emails or 100 billion, SendGrid is built to scale. Integrate with our RESTful APIs and SMTP in minutes, with sample code libraries available in 7 languages, interactive docs, templates, and more.Starting Price: $19.95 per month -
3
SMTP.com
Ziff Davis
Reliable SMTP relay and email delivery services. Powerful email delivery services that enable you to send and track high volume emails effortlessly. Integrate and start sending in minutes. All your transactional, email relay and email delivery needs under one roof. Whether you need a low-latency email delivery provider for your transactional emails, scalable infrastructure for high-volume sends or reliable backend solution for your marketing campaigns, SMTP is built to deliver. Reputation Defender is SMTP’s proprietary technology that uses big data to proactively monitor your email list health and safeguard your domain and IP reputation among ISPs by suppressing bad emails in your sends from hard and soft bounces. This ensures your delivery rates and inbox placement incrementally gets better over time.Starting Price: $25 per month -
4
KumoMTA
Kumo Corp
KumoMTA is an Open-Source, enterprise-grade email message transfer agent (MTA) software for sending high-volume, business-critical emails. KumoMTA is typically chosen by high-volume email users looking to replace PowerMTA, Momentum, or traditional Open Source MTAs. KumoMTA offers high-performance message relay to the tune of millions of messages per hour per server, combined with extreme flexibility and configurability through its use of a Lua scripting engine for configuration and message management. For more information on KumoMTA see our Sourceforge project page.Starting Price: $0 -
5
WP Mail SMTP
WP Mail SMTP
If you're having issues with WordPress not sending emails, you're not alone. With the rise of aggressive spam filtering, it's tough to reach the inbox unless your emails are configured correctly. Once you've switched from the default WordPress email settings over to WP Mail SMTP, your email deliverability issues will be solved for good. Are you missing out on leads and sales because emails sent from your WordPress site are ending up in the spam folder? Missing out on these opportunities can be a big hit to your bottom line. When your emails are properly authenticated using SMTP, they'll be recognized as legitimate and bypass those aggressive spam filters. WP Mail SMTP integrates with all of the best secure SMTP providers. No matter how many emails you need to send, you can connect with the right provider for your business needs and budget.Starting Price: $49 per year -
6
MailerLogic
MailerLogic
MailerLogic is an Enterprise Email Delivery Platform combining ESP-grade infrastructure with real-time deliverability intelligence. It bridges the gap between transactional APIs and bulk sending, ensuring emails land in the inbox, not spam. Key Functionality: 1. Smart Routing: Separates transactional and bulk streams automatically to keep priority mail fast and reputation high. 2. Email Validation: Real-time syntax, domain, and risk checks to reduce hard bounces before sending. 3. Deliverability Tools: Content scoring (spam-risk preview), abuse prevention, and a live 0–100 Health Score for reputation monitoring. 4. Developer-First API: Clean REST endpoints and SMTP relay with SDK examples for Node, Python, and cURL. 5. Webhooks & Analytics: Real-time event notifications (delivered, opened, bounced) and aggregated statistics APIs for external dashboards. 6. Automated Compliance: Built-in suppression list management for unsubscribes and bounces at the transmission layer.Starting Price: $9/month -
7
MailerSend
MailerSend
MailerSend is a transactional email and SMS service designed for developers to work faster and smarter. A drag & drop builder and dynamic templates enable anyone at any skill level to create personalized transactional emails, while our SMS templates help you create professional transactional SMS messages. MailerSend’s advanced infrastructure scales with your sendings, while the latest security protocols protect your sender reputation. Plus, you can integrate your email sending and tracking in your apps using SMTP or a flexible email API. Built by deliverability experts, and with the inbuilt email verification tool, you can rest easy knowing your messages will be delivered and avoid spam folders, while dedicated IPs are available for high-volume senders. Plus, inbound routing enables your customers to interact with your messages, sparking conversations and increasing engagement. Get started for FREE with 500 emails, then upgrade for as little as $7/month for up to 5000 emails.Starting Price: Free -
8
Labnify
Labnify
Labnify provisions email API and SMTP-integrated mailer so you won't need any of those pesky SMTP credentials. A system that delivers and track mass emails reliably enriched with features like real-time analytics, open/click metrics, bounce/spam tracking, template builder, and more. No one likes being blacklisted. That's why our innovative blacklist monitoring feature keeps a watchful eye on your sending reputation, ensuring your emails always land in the recipient's inbox. Plus, Labnify takes email authentication seriously, utilizing DKIM/SPF authentication to enhance your deliverability and add that extra layer of security. Millions of emails have relayed via Labnify as it's easy to work with. Simply import your email list and hit SEND without the need for an SMTP credential, making it a 2-in-1 email marketing stack. Built on the most cost-effective Email API, deliverability and scalability matter. Easily connect and send your email using our automated system and scale.Starting Price: $99/month -
9
Ongage
Ongage
Ongage is an email marketing platform for advanced email marketers who send high-end campaigns and want to understand their audience better. Developers and non-developers can run high-volume campaigns, with advanced capabilities, on an intuitive dashboard that provides full control and get the job done! Gain actionable insights into customer behavior, send data-driven emails, segment according to intent, and more. Design personalized experiences based on your customers’ actions, with automated real-time emails that funnel your audience towards your goals. Ongage is a one-stop-deliverability-shop, with system capabilities, reports, and experts that can slice and dice deliverability from every angle. Sync your CRM, CDP, and data warehouse with Ongage and optimize campaigns to make an impact in real-time. Connect any SMTP relay, MTA, or use the built-in Ongage SMTP to send your emails. In Ongage, you can send from several SMTPs or just one. -
10
PowerMTA
Bird
PowerMTA is an enterprise-grade email message transfer agent (MTA) software for sending high-volume, business-critical emails. PowerMTA can be run on your own server or in any public cloud such as Amazon Web Services or Microsoft Azure. With unmatched reliability and powerful analytics, PowerMTA gives you total control of your email sending. Improve performance, deliverability, and team efficiency with a simple set up, a small hardware footprint, and robust analytics. Try PowerMTA with Signals today, with volume pricing starting at $8,000 per year. PowerMTA includes SparkPost Signals, offering a complete view of your email sending. Analyze per-domain, per-campaign, and even per-recipient performance, allowing you to optimize your sending and prevent problems before they occur. PowerMTA provides unsurpassed delivery and performance in a stable SMTP environment. High-speed sending with total control.Starting Price: $8000 per year -
11
Amazon SES
Amazon
Amazon Simple Email Service (SES) is a cost-effective, flexible, and scalable email service that enables developers to send mail from within any application. You can configure Amazon SES quickly to support several email use cases, including transactional, marketing, or mass email communications. Amazon SES's flexible IP deployment and email authentication options help drive higher deliverability and protect sender reputation, while sending analytics measure the impact of each email. With Amazon SES, you can send email securely, globally, and at scale. Using either the Amazon SES console, APIs, or SMTP, you can configure email sending in minutes. Amazon SES also supports email receiving, enabling you to interact with your customers at scale. Regardless of use case or sending volume, you only pay for what you use with Amazon SES.Starting Price: $0.10 per month -
12
MailerQ
MailerQ
MailerQ is a high-performance on-premise Mail Transfer Agent (MTA) for delivering millions of emails per day. It is built with a strong focus on performance, ease-of-use, and insights. The MTA comes packed with an intuitive Management Console, REST API, and other functionality necessary for every serious sender to retain and improve their sender reputation and deliverability rates. That’s why it's increasingly becoming the preferred solution of choice for senders of all kinds, from Email Service Providers and e-commerce platforms to banks and government institutes. The management console allows for real-time insights in delivery attempts and results, queues, error logs and a lot more per MTA, IP, target and even per customer, campaign or message type. Response patterns allow you to classify bounces, process feedback loops and adapt MTA behavior based on server responses. This will help you maximize your email deliverability and sender reputation.Starting Price: €10,000 one-time payment -
13
Bit SMTP
Bit Apps
Many site owners face the spam mail problem for using the WordPress default PHP mail function. There may be some restrictions when it comes to mail service: sometimes emails are not delivered, sites cross the limit of outgoing mail. Bit SMTP plugin allows you to authenticate the mail service of your site by configuring the SMTP server of your desired mail service. SMTP is a protocol that helps your WordPress site make its email deliverability more easygoing & reliable. By enabling this feature, you can send mail from your site to your recipients via your preferred mail server. -
14
DMARCLY
DMARCLY
Block phishing, business email compromise, ransomware, spam, and improve email deliverability. DMARC is more than just email security. It's also about email deliverability. Stopping email spoofing effectively increases user engagement, which in turn improves your domain sender score. A high domain sender score improves your email deliverability: your business emails are more likely to reach the inboxes. Email deliverability depends on successful email authentication. Ever wonder if your emails are properly authenticated and delivered? Stay confident about email deliverability with DMARCLY reporting. Knowing that your legitimate emails land in the inbox while others don't brings marketers ease of mind. No auth, no entry. Email service providers like Gmail and Office 365 are increasingly sending unauthenticated emails to spam or even rejecting them outright. DMARCLY is a comprehensive SPF, DKIM and DMARC monitoring solution.Starting Price: $14.99 per month -
15
SMTP Provider
SMTP Provider
Experience the next level Email Marketing at an affordable price. Use a dedicated IP address to increase your sender reputation and avoid blacklisting of your IP due to someone else’s actions. Show that it’s really your own company and domain sending the message, and minimize the amount of messages that are marked spam by using the special cryptographic signatures SPF and DKIM. Our SMTP servers send your emails using secure SSL connection. Moreover, it's lightning fast. For each mailing list, you can discover the amount of messages sent out, the number of conversions made and links clicked, and many other details. Our SMTP service generates sending reports and delivery error reports. All reports can be downloaded to your computer. Your mailings won’t be sent to any addresses on the list of recipients who have unsubscribed, even if they are on a mailing list. Make sure that your emails are delivered to the inbox and not the spam folder. -
16
SendPost
SendWorks
SendPost replaces manual workarounds, messy hacks and daily frustrations that come along with your email API/SMTP provider. See if you are sending only a few thousand emails then most email API solutions work well. You will choose one of them based on price, features or support. The real problem comes if you are one of the big senders—sending millions of emails per month. That's when managing multiple sending domains, IP-Pools and IP/Domain reputation becomes a severe headache. At that scale, even a minor dip in your email open rate or deliverability impacts your revenue. You want a solution which helps you understand what broke with your email deliverability and how you can fix it quickly. You don't want to spend hours wading through logs and manually checking if your domain or IP is blacklisted or your sending reputation is low.Starting Price: $7 per month -
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Elastic Email
Elastic Email
Tens of thousands of companies already send their emails with Elastic Email. An amazing Email Marketing platform, built on the most cost-effective Email API. Deliverability, reliability and scalability matter. Easily connect and send your email via our HTTP API or SMTP relay and scale to 100+ million emails per month on our ultra-fast global infrastructure. Build better relationships with your recipients with every campaign you send. Elastic Email provides all the marketing tools you need to help your contacts feel connected. Deliverability, reliability, and scalability matter. Easily connect and send your email via our HTTP API or SMTP relay and scale to 100+ million emails per month on our ultra-fast global infrastructure. Get the most out of your email marketing. Create beautiful emails, send newsletters, and automate your campaigns in a flash.Starting Price: $5 one-time payment -
18
SMTPBOXES.COM
SMTPBOXES.COM
It is necessary to modify your domain name system (DNS) records in order to use our service.If you don't know how, we can do this for you for FREE! We provide you with SMTP connection for your mass email client, as well as free online sending platform upon registration. It is our job to check and maintain the servers in order to serve you with 98% deliverability! Please keep recipients list hygiene. We provide reliable and flexible SMTP servers that can adapt to all kinds of situations. There are two main categories in terms of email delivery process. Mass emails and transactional emails. We encourage you to use our service for mass email campaigns, although transactional emails work as well! You just have to tell us the purpose and we will make the adjustments. Email deliverability is something that we know you care about. That is why we periodically do email marketing campaigns ourselves and track the performance.Starting Price: €23.99 per month -
19
Maileroo
Maileroo
At Maileroo, we provide a powerful platform for both SMTP relay and email marketing. We ensure fast, reliable email sending with real-time tracking of deliveries, clicks, opens, and bounce rates. With our free Email Verification API, dedicated IPs, and DNS Records for sender authentication, we help reduce bounced emails and improve deliverability. Our email marketing platform makes it easy to create and manage campaigns. You can personalize emails, use our drag-and-drop email templates, form builders, and flexible Contacts API. We provide real-time statistics and in-depth analytics to help you optimize your campaigns and boost engagement. We also offer seamless DNS setup, automation tools, multi-sender identities, and efficient contact management. Whether you're a small business or growing enterprise, Maileroo offers budget-friendly pricing and everything you need to scale your email marketing, making it a smart choice for businesses of all sizes.Starting Price: $10 per month (25,000 emails) -
20
turboSMTP
turboSMTP
TurboSMTP understands that email is not just a means of communication but the backbone of your customer engagement strategy. TurboSMTP Email API is trusted by developers and marketers alike for its time-saving features, scalability, and delivery expertise. Our service offers a flexible SMTP relay solution along with advanced features tailored to meet the needs of businesses of all sizes. With our intuitive dashboard, powerful features, and dedicated support, ensuring the delivery of your emails is seamless and uninterrupted. TurboSMTP's infrastructure is built to scale, whether you're sending a few hundred emails or millions. Integration with our service is effortless, with sample code libraries available in multiple languages, interactive documentation, and customizable templates. Monitor engagement data and optimize deliverability with our comprehensive reporting tools. Trust TurboSMTP to deliver your emails reliably and efficiently, empowering you to engage with your audience.Starting Price: $14.95 per month -
21
Inboxroad
Inboxroad
Ensure your emails get delivered to your users. Scale up to 10M+ emails per month with our powerful SMTP infrastructure and robust API. Enjoy personal weekly advice in your mailbox. Our email expert offers you a weekly delivery report full of tips and optimizations. Get 24/7 support and monitoring. Reach us day and night through Whatsapp, phone or email. We are there to help when you need us. Don’t get lost in irrelevant data. Get a quick summary of your deliverability and find out specific bottlenecks. Instantly see how well your doing in terms of email deliverability. Select your last week, month or custom period of time. Optimize your delivery rate with detailed insights about bounces, deliveries & more. Pinpoint bottlenecks quickly. You receive weekly personal, actionable advice to optimize your email delivery rate further. Our experts monitor your email delivery 24/7 to make sure everything’s okay.Starting Price: €59 per month -
22
TrulyInbox
TrulyInbox
TrulyInbox’s warm-up sends emails like a real human, one at a time and at varying intervals for natural interaction with your inbox for a high Sender’s Reputation. You can increase your email frequency gradually as your Sender’s Reputation improves, helping to ensure that your emails land in the right inbox and avoid being marked as spam. TrulyInbox’s deliverability score lets you track your inbox reputation and deliverability rate, allowing you to keep an eye on your sending pattern. Anyone who sends cold emails for a wide range of use cases, such as marketing, and lead generation purposes. Outreach specialists, recruiters, marketers, salespeople, etc can benefit from email warm-ups.Starting Price: Free -
23
MailDeck
MailDeck
MailDeck is the market-leading enterprise cold email infrastructure platform, engineered from the ground up for high-volume senders who demand uncompromising deliverability at scale. Trusted by sales teams, growth agencies, and revenue organizations sending millions of emails per month, MailDeck provides the most reliable inbox architecture available for cold outreach. The platform seamlessly integrates Google Workspace, Microsoft 365, and a wide range of SMTP providers into a unified, enterprise-grade sending infrastructure.Starting Price: $99 for 30k emails/month -
24
Mailchimp Transactional Email (Mandrill)
Mailchimp
Transactional emails: Reach inboxes when it matters most. Deliver fast, personalized transactional emails using API or SMTP. Get the benefits of our experience sending billions of emails globally. Send personalized transactional emails that reach inboxes, not spam folders. Customize your analytics with pre-built dashboards, export API, and more. Read documentation guides, or contact our award-winning Support team for help. Use custom tagging, whitelabeling, conditional content, and more. Globally distributed infrastructure: Featuring automatic SPAM loop registration and pre-warmed dedicated IPs. Get analytics in multiple ways, plus custom tags, A/B test capabilities, and comparative reports. Utilize white-labelled click tracking, custom reverse DNS, rules engine, custom return path, and sub-accounts. That’s the average time to delivery for top 3 ISPs, sent from our MTAs to the recipient’s email server. -
25
Postmastery
Postmastery
Postmastery provides a platform for professional email monitoring that goes far beyond the obvious ‘click & open’ statistics. Postmastery’s Delivery Analytics platform processes SMTP delivery data from both on-premises mail servers and SMTP providers. It reads data from Microsoft SNDS, Return Path Sender Score and relevant blacklists. Users have access to real time dashboards and receive automatic alerts. High bounce rates, increased delivery times, junk foldering or blacklisting are serious problems in email marketing and they impact your business. Since they affect your reputation , it's best to stay ahead of them. Postmastery offers a baseline for improvement and carries out an email delivery assessment. And, if needed, our specialists provide hands-on support at infrastructure level as well. Focus on your core business and outsource your delivery monitoring to Postmastery. Email delivery experience, expertise and tooling is at your disposal via our 'email delivery control centre'. -
26
ScaledMail
ScaledMail
ScaledMail is a specialized email infrastructure platform designed to support large-scale cold email outreach campaigns while maintaining high deliverability and sender reputation. It provides businesses with preconfigured email infrastructure that allows them to send large volumes of outbound emails without needing to manually set up domains, mailboxes, or technical authentication systems. Instead of building and maintaining dozens of individual email accounts, users receive ready-to-use inbox environments distributed across multiple domains, which helps distribute sending volume and reduce the risk of emails being flagged as spam. It automates complex technical requirements such as DNS configuration and email authentication protocols, including SPF, DKIM, and DMARC, ensuring messages are properly verified and more likely to reach recipients’ primary inboxes. -
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PostageApp
PostageApp
PostageApp is an Email Service Provider (ESP) with a no-hassle approach. We aim to get you set up within minutes for our simple email service, while not compromising on the cutting edge of deliverability best practices, such as DKIM, SPF, rigid RFC compliance and full participation in ISP Feedback Loops. We offer startup-friendly shared plans for getting your MVP off the ground, with progressive increases through to our Dedicated IP plans allowing your app to grow and you to take ownership of your reputation ensuring maximum throughput. Our developer-focused support and tools get you started without a hitch, our in-house deliverability experts actively monitor and work with you to hit inboxes and our reporting, tracking and analytics provide insight into your campaign's success. -
28
Warmbox
Warmbox
Reach the inbox of your leads with Warmbox, the warm-up tool that raises your inbox reputation & increases your email deliverability. Running cold emailing campaigns for sales or marketing needs without a warm-up can be risky for your sender's reputation & your deliverability. Send cold email campaigns that don't land in spam. Let your emails reach the inbox, get more leads and generate more sales! Get detailed analytics & monitor your inbox reputation. After a few days, you will see the first results appear, and your cold emails will not land in spam anymore & reach your target inboxes. Fully flexible, Warmbox let you add on the fly new inboxes, team members, or even brand-dedicated workspaces for cold outreach lead agencies directly on your dashboard.Starting Price: $15 per month -
29
AuthSMTP
AuthSMTP
AuthSMTP is the outgoing SMTP email service for your e-commerce website, mailing list or email application on most current computers and mobile devices. With instant setup, a money back guarantee and very low cost starter accounts you can test and start sending email in minutes with no risk. Our systems are custom designed / built for reliability and performance when processing and delivering very high volumes of email. We use high performance and redundant systems to help ensure we can provide the highest levels of availability. We provide an online Control Panel plus email and web based support backed by knowledgable support staff on hand to provide help if required. We have over 15 years experience providing email services and getting emails delivered quickly and accurately to your recipients.Accounts are created instantly when you sign up so with our setup guides you can start sending email within minutes.Starting Price: $36 per year -
30
lemwarm
lempire
Keep your emails away from spam. The only tool you need to warm up and boost your deliverability. With lemwarm, you automatically warm up and boost your deliverability, so your emails land in the inbox. Set up your lemwarm by connecting your email provider. Just a few steps, no technical skills needed. Automatically tailor your warm-up and deliverability booster strategy according to your targeted audience, email goals, and needs. Increase your email sending reputation and deliverability, and stay away from spam by sending automated lemwarm-up emails from your inbox daily. Get automatically assigned to a specific cluster of lemwarm emails according to your industry, audience, and email goals. Based on your email domain’s age, you’ll get the right strategy to increase your deliverability. lemwarm will gradually increase the number of emails sent until the perfect delivery is achieved, keeping you away from spam.Starting Price: $29 per month -
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Flowmailer
Flowmailer
-- The email engine you can build on -- We're everything that happens under the hood of your email communications. Reliable Email API with endless capabilities & features ready for integration. Flowmailer's Email Engine provides all the tools you need to build a professional email strategy. From marketing to customer support, from account management to warehousing, every email sent is valuable. Where others choose to focus on an email's looks rather than its performance - we opt for solid email deliverability first. Every email that hits the inbox is a valuable moment between you and your customer. Email Engines change the way we send emails. Ready to create the unparalleled email experience your customers deserve?Starting Price: €89 per month -
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Pabbly Email Marketing
Pabbly
We support full scale marketing automation on all plans. We also integrate with 300+ applications. Start your automation for new leads inside any external source. Eg: New Leads in Calendly, Starts lead nurturing automation automatically. Includes an in-built delivery engine with 98% email deliverability. Automatically deliver emails on pre-set schedule to engage your subscribers. Clean your email list to remove bad emails before sending emails. Quickly Create emails with an in-built email builder. Send an automatic follow-up email to non-opens. Easily manage all your subscribers at one place. Easily import emails to your list within Pabbly Email Marketing. Easily add a subscription form to your website to capture leads from the website. Automatically send a welcome email when a new subscriber joins your email list.Starting Price: $29 -
33
KenMail
Kenscio Digital Marketing Pvt. Ltd.
KenMail is Kenscio’s enterprise-grade email marketing platform built for brands that need reliable, scalable, and high-deliverability email communication. Designed for both promotional and transactional messaging, KenMail helps businesses send personalized campaigns, manage bulk email operations efficiently, and improve inbox placement with a cost-effective, plug-and-play solution. Kenscio positions KenMail as a SaaS platform for high-volume email delivery with strong inbox performance and easy campaign execution. For businesses searching for an email marketing tool, bulk email sender, or email campaign software, KenMail supports streamlined campaign execution from setup to delivery. The product page highlights features such as effortless bulk email sending, easy onboarding, cost efficiency, and primary-tab-focused inbox delivery. Kenscio also presents performance proof points on the page, including an average open-rate lift and CTR improvement for campaign outcomes. -
34
Mailtrap
Railsware
Mailtrap is an email delivery platform for developers and product teams, providing a flexible RESTful API and SMTP service to send emails at scale. The platform is built with a focus on high inboxing rates, fast delivery, and 24/7 technical support from deliverability experts. Mailtrap ensures 99.99% uptime with dedicated IPs, auto warm-up, and sender reputation protection. Developers can integrate quickly using SDKs for major languages (Python, Ruby, PHP, etc.) and manage high-volume sending with a customizable API. The platform provides industry-best analytics with helicopter-view dashboards to monitor key metrics and 30-day logs for easy debugging. Trusted by over 150,000 monthly active users including Yelp, PayPal, Atlassian, and Adobe.Starting Price: $15/month -
35
Warmy
Warmy
Warmy.io is a tool designed to enhance email deliverability by raising your email reputation to ensure your emails avoid the spam folder. The platform offers automated warm-up with the help of "Adeline", their AI engine. Users can connect their mailbox and let the system warm it up at an optimal pace, analyzing hundreds of parameters daily, interacting with real people on your behalf, and ensuring your emails reach the inbox. Additionally, emails sent through Warmy.io are automatically opened, marked as important, and taken out of the spam folder, boosting the sender's reputation. The platform provides a clear and transparent process, allowing users to stay informed and in control with tools like the Email Deliverability Checker, Email Health Checker, and Email Template Checker. The website showcases testimonials from satisfied customers and offers a 7-day trial without the need for a credit card.Starting Price: $49 per mailbox per month -
36
Instant Bulk SMTP
Instant Bulk SMTP
We understand how important role marketing plays in business and by looking that we have designed our Instant Bulk SMTP service which help to start sending your campaign in less than 30 minutes. Manage multiple contact lists, add, remove, delete, and import-export. Not only can you check bounces, opens, and click-throughs using our email analytics. You can set up or integrate with your applications. Easy to upgrade to a higher plan without any hassle. Instant Bulk SMTP is an outgoing email service that will allow you to send emails from your email address whether you have your own software or you don’t have your own software. We understand how important the role marketing plays in business and by looking at that we have designed our Instant Bulk SMTP service which helps to start sending your campaign instantly. Unlike typical email marketing services, our high-volume SMTP hosting service lets you send from your own application server, email client or a combination of different sources.Starting Price: $50 per month -
37
Warm Up Your Email
Warm Up Your Email
Email clients like Gmail and Outlook have intelligent algorithms that know your email-sending history. If you blast emails with a new account or ever make a mistake, their algorithms put you in spam jail. Your only chance to leave spam jail is if somehow their algorithms learn that you're not spamming anymore. Warm Up Your Email receives your email and interacts positively to help you improve your sender reputation. Configure the daily send volume, as well as the subject and the body of your email, to start sending emails at your desired volume with your desired content. Your campaign will begin, and you’ll start seeing numbers in your dashboard showing how many were sent, opened, and replied to. Start analyzing the behavior of accounts hitting the spam folder with a 10-day spam pattern report that shows how using Warm Up Your Email affects your email deliverability and if you’re getting back to the inbox over time.Starting Price: $29 per month -
38
Microsoft SMTP Service
Microsoft
Microsoft SMTP Service is a mail server software that enables Microsoft Windows Server operating systems to send and receive emails. It is a component of Internet Information Services (IIS) and is used to relay emails between mail servers. Microsoft SMTP Service is a popular choice for organizations that need a reliable and scalable mail server solution. It is easy to install and configure and can be used with a variety of email clients. Microsoft SMTP Service supports a number of features, including: Relaying emails between mail servers: Microsoft SMTP Service can relay emails between mail servers, which means that it can be used to send and receive emails for multiple domains. Supporting multiple email clients: Microsoft SMTP Service can be used with a variety of email clients, including Microsoft Outlook, Mozilla Thunderbird, and Apple Mail. Providing security features: Microsoft SMTP Service provides a number of security features, such as authentication and encryption -
39
Mailora
Mailora
Mailora is a modern email deliverability intelligence platform designed to help businesses ensure their emails reach the inbox instead of spam. Built for marketing teams, growth teams, and email operations professionals, Mailora provides deep insights into email performance across global ISPs, devices, and user environments. The platform offers advanced inbox placement testing, real-time deliverability monitoring, and actionable analytics that help teams identify why emails fail to reach the inbox and how to fix those issues quickly. With Mailora, organizations can track sender reputation, analyze spam filter behavior, and monitor authentication standards such as SPF, DKIM, and DMARC. Mailora simplifies complex deliverability challenges by turning technical data into clear, easy-to-understand insights. This allows teams to optimize their email campaigns, improve engagement rates, and protect their sender reputation.Starting Price: $40/month -
40
Moosend
Moosend
Moosend is an affordable, intuitive email marketing and marketing automation platform, suitable both for beginners and seasoned marketers. Thanks to its 1-day implementation, 100+ email templates, automation recipes, and AI Writer, users can set up their campaigns right away. And they can rest assured emails will reach the inbox as Moosend scores a 98% deliverability rate. They can also use advanced features like Audience Discovery to get smart segments based on customer behavior, transactional emails to send important updates at the right time, and custom reports to track the numbers they need. Users can pick a pricing plan that works for them. Or, create a custom plan with add-ons of their choice. No matter their plan, they can reach the support team through email or chat and get advice on how to optimize their campaigns. Finally, Moosend is GDPR and ISO-27001 compliant and follows all the latest security standards to guarantee customer data remains safe.Starting Price: $9.00 per month -
41
SMTP2GO
SMTP2GO
Send and track all emails easily and securely with SMTP2GO, a reliable outgoing email service solution. SMTP2GO features a redundant, multi data center infrastructure that allows users to send emails even if there is a major internet outage. SMTP2GO has features like real-time analytics, bounce/spam tracking, weekly summaries, spamtrap detection, blacklist monitoring, DKIM/SPF, and more.Starting Price: $10 per month -
42
Migomail
Migomail
Using an SMTP relay service like Miogmail is the simplest way to get started sending marketing and transactional emails. Send emails as per specific action or send series based bulk email relentlessly. Design creative customize email templates using drag-drop editor or use readymade responsive template. Security is Security is first priority, secure email infrastructure integration with SSL, DKIM, DMARC, SPF, SSL, TLS. Increase your email delivery with advanced management tools and Dedicated IP address. Create professional-looking personalized transactional, promotional and newsletter email. Utilize transactional/promotional SMTP or SMTP API to send bulk email. -
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mySMTP
mySMTP
Send email to whoever you wish with unlimited capacity and traffic. The mail server works regardless of whether you are using your desktop computer at home or a laptop, tablet or telephone while you’re on the move. Avoid blacklistings and forget maintenance, updates, down time and other hindrances. We send your email campaigns to the entire world via stable SMTP cloud servers. If you choose a dedicated SMTP cloud server, you send email using your own IP number and domain. This gives you full control of the reputation of what you send. If you need a fullscale professional system to handle email lists and make state of the art email content - we offer Mailwizz. More emails are sent than ever before and there is still no new product on the market that looks like it would be able to replace email as the direct route to the attention of the recipient. When it comes to marketing, email gets the highest marks for return on investment with regard to advertising in social media, for example. -
44
Cllavio
Cllavio
Cllavio is a high-deliverability email marketing and transactional email platform designed for startups and growing businesses. It includes a fast campaign builder, a powerful SMTP and REST API, clear analytics, AI-powered spam detection, and domain warming tools to help your messages reach inboxes. With automated bounce monitoring, DKIM/SPF/DMARC validation, Shopify integrations, and predictable pricing, Cllavio makes it easy to send newsletters, cold emails, bulk campaigns, and transactional notifications from a single dashboard. It's designed for teams that want speed, reliability, and scalable email delivery without the enterprise complexity.Starting Price: $9.99 -
45
Folderly
Folderly
AI-based email deliverability platform for monitoring, spam testing, and maintaining your email deliverability by solving any spam issues. Our goal is to help marketers accelerate their sales by assisting them in sending emails that drive revenue. Over 51% of all business emails worldwide never reach the inbox. Losing your emails to spam folders ultimately leads to budgeting issues and missed sales opportunities. Folderly makes sure that you're never in that 51%. Avoid blacklists, bypass spam filters, and see your messages delivered to your email recipients’ inboxes. We designed Foldely from the ground up to help companies receive returns on their marketing dollars. Whether you're looking to increase the email deliverability of your emails across multiple email addresses, or want to prevent any spam-related problems before they occur - Folderly is a great starting point to make sure your messages are reaching your recipients' inboxes.Starting Price: $160 per month -
46
Netcore Email API
Netcore
Choose the best email API or SMTP for the most robust email delivery experience. Netcore Email API (formerly known as Pepipost) provides a powerful transactional email delivery infrastructure and AI-powered inboxing which is reliable, scalable, secure and easy-to-use, at the most affordable pricing plans. We help brands to engage with their customers at the right moment with the right content over emails.Starting Price: $25 per month -
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WarmInbox
Offpista LTD
WarmInbox helps individuals and teams improve email deliverability by simulating real, human-like interactions—sending, opening, replying, clicking, and threading—to gradually build sender reputation and avoid spam folders. Designed for marketers, founders, sales teams, and agencies, WarmInbox runs automatically in the background, warming up each email account with trusted, natural-looking activity. Key Features: - Automated email warm-up, Monday through Friday - Realistic activity: opens, clicks, replies, and threads - Live dashboard to monitor deliverability health and inbox placement - Support for multiple inboxes and team members - Invite teammates and manage everything from one central dashboard - Secure setup using app passwords or OAuth - Pause or remove campaigns anytime - Transparent pricing with per-seat billing Whether you're warming a new domain or trying to fix poor deliverability, WarmInbox ensures your emails land where they should—the inbox.Starting Price: $15/month -
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Mailivery
Mailivery
Cold emails have a high chance of going to spam or promotions folder. The algorithms of email providers make sure only real emails - with real interactions - land in the primary inbox. Mailivery uses AI and a peer-to-peer network to improve your sender reputation and counteract your cold emailing campaigns. Mailivery uses AI to interact with real emails behind the scenes in your inbox. Our algorithm removes your emails from spam and positively replies to them to improve your deliverability in real time. With our dashboards, you can find out how many of your emails are landing in spam in real time and see detailed analytics about the improvement of your reputation. Mailivery lets you check if you are blacklisted and gives you actionable recommendations on how to improve your reputation.Starting Price: $15 per month -
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TransMail
Zoho
Guaranteed and instant delivery for your transactional emails. Your transactional emails carry crucial information. TransMail is a reliable and secure service that delivers these all-important emails instantly. With high-speed delivery and great inbox placement, TransMail means you no longer keep your customers waiting. Transactional emails are unique emails that are usually triggered by some user action. More often than not, your customers are expecting these emails in their inbox within seconds of the trigger action. Pick the right delivery service and keep your customers happy. Your users will no longer be left refreshing their inbox for their email verification code or password reset emails. Email deliverability is a consequence of the reputation of the sender IP address. TransMail is built exclusively to tackle the challenges of sending transactional emails.Starting Price: $2.50 per credit -
50
MailReach
MailReach
Track how your reputation is doing, and maximize and maintain it over time to get the best email results. Get reports to fix your deliverability, enjoy a better inbox placement and stay away from spam. MailReach uses your email address to automatically start email conversations with thousands of high-reputation inboxes. The warm-up emails sent are human, and natural and make sense to build trust. No gibberish content that can harm your reputation. The ramp-up is automated and done gradually following smart rules to maximize the efficiency of the email warm-up. Your warming emails get opened, replied positively, marked as important, and removed from spam and categories. All this positive email engagement increases your email reputation and deliverability. It teaches the inbox providers to send your emails to the main inbox and not to spam.Starting Price: $25 per month
