Alternatives to Mailu
Compare Mailu alternatives for your business or organization using the curated list below. SourceForge ranks the best alternatives to Mailu in 2026. Compare features, ratings, user reviews, pricing, and more from Mailu competitors and alternatives in order to make an informed decision for your business.
-
1
Mail-in-a-Box
Mail-in-a-Box
Mail-in-a-Box lets you become your own mail service provider in a few easy steps. It’s sort of like making your own gmail, but one you control from top to bottom. Technically, Mail-in-a-Box turns a fresh cloud computer into a working mail server. But you don’t need to be a technology expert to set it up. Each Mail-in-a-Box provides webmail and an IMAP/SMTP server for use with mobile devices and desktop mail software. It also includes contacts and calendar synchronization. The box also includes other standard mail functionality like spam protection (spam filtering and greylisting), mail filter rules, email client autoconfiguration, and automated backups to Amazon S3 and other services. The box also includes automatic DNS configuration when you let it become your nameserver so that it can set important DNS records for mail deliverability and security including SPF, DKIM, DMARC, and MTA-STS. When enabled, DNSSEC (with DANE TLSA) provides a higher level of protection.Starting Price: Free -
2
Hermes SEG
Black Fish Networks LLC
Hermes SEG is a free, open-source secure email gateway and server. It delivers spam, virus, and malware protection using SpamAssassin, ClamAV, and Amavisd-new, along with full encryption in transit and at rest via SMTP TLS, S/MIME, PGP, encrypted PDF (CipherMail), and Dovecot mail-crypt. It includes email archiving and integrated mailbox hosting with quotas, aliases, shared folders, Sieve rules, vacation replies, and mobile auto-configuration. Collaboration features come through Nextcloud (webmail, file sync, calendars, contacts). Identity and access are managed with OpenLDAP and Authelia, supporting SSO and MFA (TOTP, WebAuthn, Duo). It also enforces modern authentication standards: SPF, DKIM, DMARC, and ARC.Starting Price: $0/month/user -
3
Courier
Double Precision, Inc.
The Courier mail transfer agent (MTA) is an integrated mail/groupware server based on open commodity protocols, such as ESMTP, IMAP, POP3, LDAP, SSL, and HTTP. Courier provides ESMTP, IMAP, POP3, webmail, and mailing list services within a single, consistent, framework. Individual components can be enabled or disabled at will. The Courier mail server now implements basic web-based calendaring and scheduling services integrated in the webmail module. Advanced groupware calendaring services will follow soon. The Courier mail server's source code should compile on most POSIX-based operating systems based on Linux, and BSD-derived kernels. The Courier mail server should also compile on Solaris and AIX, with some help from Sun's or IBM's freeware add-on tools for their respective operating systems. The Courier mail server evolved out of several related projects, that merged together (more on that later). The Courier mail server implements SMTP extensions for mailing list management.Starting Price: Free -
4
Zentyal
Zentyal
Join Windows® clients to the domain and manage them transparently. No disruption to your users, no user or device CALs. Comes with industry-standard SMTP and POP3/IMAP mail server built upon the most established technologies and protocols. Guarantees reliable and secure Internet access and helps to manage all the basic network infrastructure services. Receive software updates until the EOL-date of each version and get support when needed. Zentyal offers an easy to use Windows Server® alternative. It comes with native compatibility with Microsoft Active Directory® allowing you to join Windows® clients to the domain and manage them easily, causing no disruption to your users. Zentyal includes the industry-standard SMTP and POP3/IMAP mail servers built upon the most established technologies and protocols. Gives you the opportunity to deploy Zentyal as a mail server, domain & directory server with mail or all-in one server.Starting Price: €195 per server -
5
MailEnable
MailEnable
MailEnable provides an end to end solution for providing secure email and collaboration services. A recent independent survey reports MailEnable as the most popular Windows Mail Server Platform in the world. Whether you are a hosting company providing email services to thousands of end users or a small business with a single domain, MailEnable provides a solution that will impress your mail users. MailEnable provides Windows Mail Server software with features comparable to Microsoft Exchange. It provides powerful messaging services like Exchange ActiveSync, IMAP, SMTP, POP3 and collaboration tools such as calendaring (CalDAV), contacts (CardDAV), tasks and notes.Starting Price: $349 -
6
Cyrus IMAP
The Cyrus Team
Cyrus IMAP is an email, contacts and calendar server. Cyrus is free and open source. Features: Speed Security Efficiency Search CardDAV and CalDAV support Robust data storage Replication Scalable for large installations Flexible filtering support through Sieve Supports antivirus and antispam toolkits Handles deliverability: SPF, DKIM, DMARC Extensive authentication options, through Cyrus SASL JMAP support Long list of supported standardsStarting Price: Free -
7
MDaemon Email Server
MDaemon Technologies
The MDaemon Email Server was one of the first Microsoft Exchange alternatives offered to businesses around the world. It has been developed with the ongoing input from IT professionals seeking an easy-to-use, reliable, and secure mail server that does not require expensive administration or impose high per-user costs. It simplifies messaging and collaboration with a focus on security and privacy, an intuitive, user-friendly web mail design and by offering administrators Mobile Device Management, Business Instant Messaging, Document Sharing, and other enterprise-class features that can be managed with minimal support. MDaemon Email Server supports IMAP, SMTP, and POP3 protocols, and features include: integrated webmail with IM and document sharing, Outlook support, compromised password alerts, color-coded log files for quick and easy troubleshooting, customizable email policy setting to fit your unique network environment, Mobile Device Management, Account Hijack Detection, and more.Starting Price: $360 per year -
8
Horde
Horde
Horde is the most flexible groupware on the planet, and that makes it the perfect platform on which to build your business productivity software. Horde connects to (and officially supports) more backends (all the leading SQL, LDAP, IMAP, Sieve, SMTP, cache platforms available today) than any other open source groupware system. This means you can continue to use your existing userbase and your users do not have to remember any additional passwords. Horde's feature set rivals the largest enterprise email systems. We have an incredible feature set that compares favorably against any competition in our primary apps (mail, calendar, address book), and even more in our secondary apps (time tracking, wiki, ticketing, and more).Starting Price: Free -
9
Mercury Mail Transport System
Pegasus
Mail from the outside world is received by Mercury and placed in the addressee's mailbox, where the user can access it at any later point. Messages sent by local users to the outside world are passed to Mercury, which then takes whatever steps are necessary to deliver them, removing the burden from the user's workstation and allowing him to continue with other work. If you connect using a dialup connection, then only the mail server needs to be able to access that connection. Your workstations do not need their own modems or Internet accounts. The mail server can continue processing mail even when the client workstations are turned off, allowing functions that depend on a continuously available service, such as automatic replies and auto-forwarding. -
10
hMailServer
hMailServer
hMailServer is a free, open source, e-mail server for Microsoft Windows. It's used by Internet service providers, companies, governments, schools and enthusiasts in all parts of the world. It supports the common e-mail protocols (IMAP, SMTP and POP3) and can easily be integrated with many existing web mail systems. It has flexible score-based spam protection and can attach to your virus scanner to scan all incoming and outgoing email.Starting Price: Free -
11
qmail
qmail
qmail is a secure, reliable, efficient, simple message transfer agent. Security isn't just a goal, but an absolute requirement. Mail delivery is critical for users; it cannot be turned off, so it must be completely secure. qmail's straight-paper-path philosophy guarantees that a message once accepted into the system, will never be lost. qmail also optionally supports maildir, a new, super-reliable user mailbox format. Maildirs, unlike mbox files and mh folders, won't be corrupted if the system crashes during delivery. Even better, not only can a user safely read his mail over NFS, but any number of NFS clients can deliver mail to him at the same time. qmail is vastly smaller than any other Internet MTA. Other MTAs have separate forwarding, aliasing, and mailing list mechanisms. qmail has one simple forwarding mechanism that lets users handle their own mailing lists. -
12
Dovecot
Dovecot
Dovecot is an excellent choice for both small and large installations. Dovecot is among the best performing IMAP servers while still supporting the standard mbox and Maildir formats. The mailboxes are transparently indexed, which gives Dovecot its good performance while still providing full compatibility with existing mailbox handling tools. Dovecot is standards compliant. Dovecot passes all IMAP server standard compliancy tests while most other servers fail many of them. Dovecot’s indexes are self-optimizing. They contain exactly what the user’s client commonly needs, no more and no less. Dovecot is self-healing. It tries to fix most of the problems it notices by itself, such as broken index files. The problems are however logged so the administrator can later try to figure out what caused them. Dovecot tries to be admin-friendly. Common error messages are made as easily understandable as possible.Starting Price: Free -
13
Kopano
Kopano
We provide you with your digitally sovereign solution to keep track of your e-mails and calendars, to organize yourself with tasks or to stay in contact with team colleagues via video meeting. Kopano Groupware is an e-mail and calendaring solution, which can be operated digitally sovereign. Its functionality is comparable to that of Microsoft Outlook and Exchange. Kopano Groupware installations can be operated with more than 100,000 users. Kopano Groupware is an e-mail and calendar server that provides users with their daily communication and organizational data on all devices and connects teams. Data can be jointly edited in public folders or shared with others from your own inbox.Starting Price: $17 per year -
14
MXroute
MXroute
MXroute has an excessively powerful system to ensure that your non-spam, non-marketing emails get to their destination without worrying about IP reputation. We are, quite simply, obsessed with consistent email delivery and maintaining the highest reputation among mail providers. We support the basic e-mail protocols that you expect. SMTP, IMAP, POP3. We support mail forwarding (aka aliasing), and plus addressing. We offer Afterlogic Pro (w/ CalDAV and CardDAV), Crossbox, Rainloop, and Roundcube for your choice in webmail. We offer a variety of options for obtaining support. We do expect you to understand how to use email and how to configure your DNS to use our service, but we do offer support when you need us.Starting Price: $15 per month -
15
iRedMail
iRedMail
The right way to build your mail server with open source softwares. Works on CentOS Stream, Rocky, Alma, Debian, Ubuntu, FreeBSD, OpenBSD. With iRedMail, you can deploy an OPEN SOURCE, FULLY FLEDGED, FULL-FEATURED mail server in several minutes, for free. We did the heavy lifting of putting all the open source components together and applying best practices. Our product does all the major tasks for you. Furthermore we offer professional support to back you up in case you have some problems. You have all personal data on your own hard disk, you can control the email security, inspect transaction log. No other organization can see the content of all messages. All components used in iRedMail are open source softwares, and you get the bug fixes and updates from the Linux/BSD venders you trust. iRedMail is the right way to build your mail server with open source softwares.Starting Price: Free -
16
Hexamail POP3 Downloader
Hexamail
POP3 Downloader is a high-performance, scalable, real-time POP3 connector for your mail server. It supports downloading and forwarding any POP3 or IMAP account email to any email server that supports SMTP or IMAP. Key Features: 100% Compatibility with all versions of Exchange 100% Compatibility with all SMTP servers End-user management via a web interface Antivirus and Antispam options IMAP Support (with folders) IMAP Push Support Gmail Support 1-minute scheduling No email size limits Microsoft Exchange integration without the need for a public SMTP server or static IP address Migrate or integrate unlimited external POP3 or IMAP email accounts into local mailboxes Continue receiving mail from legacy accounts during migration to a new mail server IMAP migration or IMAP sync between two IMAP servers Reliable, easy to install, and cost-effective solution Streamline your email integration processes and automate email downloads with Hexamail POP3 Downloader.Starting Price: $114/10 users -
17
Haraka
Haraka
Haraka can serve thousands of concurrent connections and deliver thousands of messages per second. Haraka and plugins are written in asynchronous JS and are very fast. Haraka has very good spam protection (see plugins) and works well as a filtering MTA. It also works well as an MSA running on port 587 with auth and dkim_sign plugins enabled. Haraka makes no attempt to be a mail store (like an exchange or postfix/exim/qmail), an LDA, or an IMAP server (like Dovecot or courier). Haraka is typically used with such systems. Haraka has a scalable outbound mail delivery engine built in. Mail marked as relaying (such as via an auth plugin) is automatically queued for outbound delivery. Haraka's plugin architecture provides an easily extensible MTA that complements traditional MTAs that excel at managing mail stores but do not have sufficient filtering.Starting Price: Free -
18
Dovecot Pro
Open-Xchange
Dovecot Pro is a full-service email platform that delivers dynamic scalability, high performance, efficient utilization of hardware, and outstanding support to the world’s largest Telcos, ISP's, and Hosters. With a marketshare of 76% of installed email backends, customers trust the performance of Dovecot Pro. Efficient hardware utilization and advanced monitoring tools for statistics and administration reduce ownership costs and save time and maintenance costs. In addition, Dovecot Pro scales up and out to hundreds of servers and millions of users and multiple physical sites. Its stateless native architecture offers maximum flexibility as each major component can be deployed on its own dedicated node. Dovecot Pro provides industry-leading support for all email standards necessary to provide both Mail Delivery Agent functionality (via LMTP and Sieve), and to facilitate mail retrieval by mail clients (via IMAP and POP3). -
19
Easy Hosting Control Panel (EHCP)
Zymphonies
Ehcp is a tool in a server to facilitate the process of hosting domains, emails, adding domains, FTP users, and so on. Full PHP, opensource, easily modifiable, customizable, Ehcp templates, domains, subdomains, FTP, MySQL, DNS (automatic), email, email forwarding, autoreply, catch-all emails, easily add domain, add the domain to existing FTP, (use sub-FTP accounts), add FTP in main FTP, add custom FTP space (custom location), custom HTTP, custom DNS, domain aliases, domain redirect, different languages, templates support, a few lang/templates included, simple, light, fast, host hundreds of domains in it, any server related program may be installed with ubuntu's apt-get command and almost all programs are always up-to-date when you update your server. -
20
Atomic Mail
Atomic Mail
Atomic Mail is a secure and user-centric email hosting provider, dedicated to offering privacy-first email services. With features such as alias creation, robust security measures, and seamless account recovery, AtomicMail ensures your email experience is both private and hassle-free. Creation of Aliases (Hide-my-email): Maintain your privacy by creating multiple email aliases; Spam Free, No Ads; Email Password Protection; End-to-End Encryption: only you and your intended recipient can read the message; Zero Access Encryption: Atomic Mail cannot access your emails; Account Recovery with Seed Phrase: Recover access to your account with a unique seed phrase. Can regain control of your email account without compromising security.Starting Price: $0 -
21
Aster Mail
Aster Mail
Aster Mail is a free, open-source, end-to-end encrypted email service for people who want real privacy without the technical overhead. All encryption happens on your device before anything reaches our servers, so we have zero access to your messages or metadata. Aster uses standard OpenPGP with portable RSA-4096 keys, so you're never locked in. Your keys work with GPG, Thunderbird, or any PGP client, and they're discoverable through WKD and public keyservers. Aster-to-Aster messages use a Signal-inspired X3DH and Double Ratchet protocol for forward secrecy. Every plan includes encrypted email, custom domain support, free aliases, tracker protection, and full access across web and desktop. The entire codebase is published under AGPL v3 on GitHub, fully auditable, with a public warrant canary and documented vulnerability disclosure. Free plan includes 10 GB encrypted storage, 5 aliases, and 1 custom domain. Paid plans start at $2.99/month. Servers located in Germany. -
22
ALTOSPAM
OKTEY
This antispam and antivirus software is an online filtering bridge that quickly free you from the waste of time and expenses generated by the flooding of undesirable e-mails. ALTOSPAM is an integrated SaaS software protecting your email from spams, viruses, scams and phishing. It allows companies owning at least one domain name to secure its email servers. ALTOSPAM combines 16 anti-spams technologies, 6 anti-viruses as well as other security services such as anti-relay, anti-scam, anti-phishing and protection against denial-of-service attacks. In addition, this externalized antispam and antivirus software ensures a very high availability of you email services. Altospam is a full-service corporate email protection, integrating multiple security levels for your emails. ALTOSPAM not only blocks most unwanted emails, but mostly its antispam software has been designed to minimize false positives.Starting Price: $7 per user per month -
23
Afterlogic Aurora
AfterLogic
Groupware system for businesses and providers, backed with mobile apps. Your private cloud combining groupware, file storage and email in a single, unified environment. Clean and modern interface. Can work with your existing mail server or use its own for the complete solution. iOS/Android apps for Email and Files let your users just type their email/password and never deal with mail server settings or blocked IMAP/SMTP ports. Can be integrated with LDAP authentication or LDAP address book, along with OAuth 2.0 authentication and resources, like Google Drive or Dropbox.Starting Price: $99.00/one-time -
24
MailWasher Pro
Firetrust
MailWasher is a program to help you get rid of spam and viruses in your e-mail. MailWasher allows you to preview all aspects of your e-mail on the server before you download it to your computer, thus protecting you from spam, viruses, phishing attacks, and other nuisances. You can then delete unwanted e-mail before it gets to you. Other features help identify and protect you against viruses and worms. Included are comprehensive antispam tools and many other features. Works with all email accounts including Outlook.com, Yahoo, Gmail, POP3 and IMAP.Starting Price: $29.96 -
25
Modoboa
Modoboa
Regain your independence and protect your privacy by installing your own email server. It takes less than 10 minutes! Create your mail server for free in less than 10 minutes with Modoboa When it comes to create a mailbox, you generally have several solutions: - Use the services offered by Internet providers (Orange, Vodafone...) of infrastructure providers (OVH, Gandi...) with a monthly or annual subscription. However, customization and configuration possibilities, domains and mailboxes number are limited. - Use the services of free email providers (Gmail, Live, Yahoo...) which are limited and your data is used for commercial purposes. - Install your own email server, which requires important technical knowledge to setup and configure the system. Modoboa is an alternative to those 3 options. It frees you from dependence on email providers and makes accessible to all the creation his own secure email server. The whole thing, in less than 10 minutes and freely.Starting Price: Free -
26
mailcow
mailcow
mailcow: dockerized is an open source groupware/email suite based on Docker. mailcow relies on many well known and long used components, which in combination result in an all around carefree email server. Each container represents a single application, connected in a bridged network.Starting Price: Free -
27
PaintTool SAI
SYSTEMAX Software Development
PaintTool SAI is high quality and lightweight painting software, fully digitizer support, amazing anti-aliased paintings, provide easy and stable operation, this software make digital art more enjoyable and comfortable. Details: - Fully digitizer support with pressure. - Amazing anti-aliased drawings. - Highly accurate composition with 16bit ARGB channels. - Simple but powerful user interface, easy to learn. - Fully support Intel MMX Technology. - Data protection function to avoid abnormal termination such as bugs. This software has 31 days trial period. You can use this software with full function without fee during the first 31 days. (CAUTION: This software disable the file open/save functions immediately when 31 days trial period expired. It means that you lose the painting from the last save point.)Starting Price: $52 -
28
Citadel
Citadel
Email, collaboration, groupware, and content management - up and running in minutes, on your own hardware, or in the cloud. Citadel is easy, versatile, and powerful, thanks to its exclusive room-based architecture. No other platform seamlessly combines so many different features using this familiar and consistent metaphor. Citadel is 100% open source software using the GNU General Public License. It's not a crippled, cut-down version of some expensive "enterprise" edition. The software you download here is the very best available, and it's all free software.Starting Price: Free -
29
The Very Good Email Company
The Very Good Email Company
Your email in safe hands! The Very Good Email Company have built a range of services around its core email filtering services: filtering, hosting, groupware tools, archiving and fax to email solutions are available. Gateway: weapons-grade anti-virus and anti-spam filtering before it hits your, or your customers’ network! MailCore Pro: email hosting and office collaboration service: providing email, shared calendars, contacts, files and notes. Includes anti-virus and anti-spam filtering as standard. Zimbra: all the benefits of the Zimbra enterprise-class email, calendar and collaboration solution, with our spam and virus filtering as standard. Now with a huge 50GB of storage per mailbox! Messagebunker: a simple, secure, easy to set up and use in-the-cloud email archiving and discovery platform that won’t break the bank. FREE Trial! -
30
WebCrossing
Elliptics
WebCrossing Community gives you the parts you need to create an infinitely flexible online community. Create any structure you need, with dozens of plug-ins and applications available to customize and add functionality to your site. WebCrossing Core is a full-featured multi-domain web server including HTTP, SMTP, IMAP, XML-RPC, FTP, NNTP and more. User objects, folders, discussions and messages are all native features. The scriptable, integrated objected-oriented NoSQL database is what you are looking for if you need to handle complex data structures. Webcrossing Neighbors group tools include blogs, discussion forums, calendars, wikis, custom pages, file stores and more. Each group can have a custom landing page. Public, private and hidden groups are supported. Since all WebCrossing servers have a built-in mail server, your members can post by email or the web, so your online forums can also be used as interactive mailing lists with an online archive.Starting Price: $99.00/month -
31
SOGo
SOGo
SOGo is a fully supported and trusted groupware server with a focus on scalability and open standards. SOGo is released under the GNU GPL/LGPL v2 and above. SOGo provides a rich AJAX-based Web interface and supports multiple native clients through the use of standard protocols such as CalDAV, CardDAV and GroupDAV, as well as Microsoft ActiveSync. SOGo is the missing component of your infrastructure; it sits in the middle of your servers to offer your users a uniform and complete interface to access their information. It has been deployed in production environments where thousands of users are involved. -
32
SKBD
SKBD
SKBD hooks you up with custom email aliases that forward mail to your main inbox, so you only receive what matters to keep your personal email private and secure. We strip tracking from emails, keep a record of blocked emails in case you need to retrieve them, and allow you to block senders at the domain level and the email level -
33
AD Query
SysOp Tools
Completely free utility for Active Directory. Lookup a user or computer and view converted schema attributes that are normally not readable. A very handy tool for schema data lookup and comparison. No installer, just run the exe. 100% free utility for use in Active Directory domains. Search individual domain users and computer objects. View object Schema & LDAP data in one simple window. View binary Schema data in “human-readable” format. Easy lookup of email aliases, last login date, etc. Export search results to XML file, open with Excel. Small program size, super quick install. AD query software for user accounts is a great time-saving utility for the busy admin! AD Query is a free utility that allows quick and easy auditing of any user or computer object within Active Directory. Unlike the standard Users and Computers MMC, AD Query shows all data populated schema, LDAP and Exchange mail-enabled attributes for the user or computer object.Starting Price: Free -
34
GroupList
Thexyz
GroupList is an email forwarding service that gives you an email address that you keep for life. We call these aliases and you can use them to protect or mask you real email address. Anything sent to your alias, is forwarded to your real email address. We also offer a group email list feature for free too. This allows you to sent out announcement to a group and control how to handle replies. We offer a paid service and power our notifications with Amazon to ensure they are low cost. Our mission is to build the world’s most simple and reliable group email platform — we make group email available to everyone who needs it. We help make it easier to send notifications and larger amounts of email to groups for a low cost. The grouplist.io domain is used for transactional email notifications, personal email hosting, group email lists, and free email forwarding (aliases).Starting Price: $2.95 per user, per month -
35
RainLoop
RainLoop
Modest system requirements, decent performance, simple installation and upgrade, no database required - all these make RainLoop Webmail a perfect choice for your email solution. Modern user interface. Complete support of IMAP and SMTP protocols including SSL and STARTTLS. Sieve scripts (Filters and vacation message). Minimalistic resources requirements. Direct access to mail server is used (mails are not stored locally on web server). Allows for adding multiple accounts to primary one, simultaneous access to different accounts in different browser tabs is supported. Additional identities. Administrative panel for configuring main options. Really simple installation and update. Integration with Facebook, Google, Twitter and Dropbox. Managing folders list. Simple look'n'feel customization. Configurable multi-level caching system. Extending functionality with plugins installed through admin panel. Perfect rendering of complex HTML mails. Drag'n'drop for mails and attachments.Starting Price: $95 per year -
36
SmarterMail
SmarterTools
SmarterMail is the ideal Microsoft Exchange alternative. It’s the only business email server on the market that offers native support for Exchange protocols: MAPI, EWS, and EAS, without requiring any additional software or plug-ins for Microsoft Outlook or other desktop or mobile clients. It delivers all the features of Exchange at a fraction of the cost. SmarterMail also includes audio/video group chat and Online Meetings for team collaboration at no extra charge. Its newest feature, the SmarterMail Marketplace, enables seamless integration with platforms like OnlyOffice, Collabora, and AI tools such as OpenAI’s ChatGPT. Available for both Windows and Linux, SmarterMail has lower hardware requirements, superior stability, and reduced maintenance costs. It’s the perfect solution for businesses of any size or industry seeking Exchange-level functionality, without the high costs.Starting Price: $500.00/one-time -
37
Zoho Mail
Zoho
Secure email hosting for your business. Host your business email on a secure, encrypted, privacy-guaranteed, and ad-free email service. Zoho Mail's data centers have top-notch security and surveillance, with a reliable 99.9% uptime. Benefit from secure email hosting that supports encryption both at rest and end-to-end, along with S/MIME message encryption. Create a domain for your business and set up custom email addresses for users. Unique and professional email addresses give your company the visibility and authenticity it deserves. Zoho Mail's powerful Control Panel is the admin's go-to place for all settings, configuration, and customization. Add users, manage group aliases, set up policies to moderate business email content, and more. Retain emails across your organization for a specified period to comply with company standards and to counter legal attacks. e-Discovery helps discover such retained emails quickly.Starting Price: $2.00/month/user -
38
Kerio Connect
Aurea
Secure, enterprise-style email, calendar & collaboration without the high cost. Kerio Connect delivers all the features and functionality for collaboration and messaging solution without the complexity and high price tag of other systems. Email is integrated with shared calendars and scheduling, contacts management, tasks, notes, shared and public folders, and instant messaging. Synchronize messages by direct push to your choice of mobile device via Microsoft ActiveSync. Instant Messaging is XMPP-compatible and can be used from various 3rd party chat/IM applications on desktop and mobile phones. You can install Kerio Connect in 10 minutes and users can be up and running in just 10 minutes more. Kerio Connect can be deployed on-premises or in partner-hosted cloud environments. Deploy for users on Mac, Windows, or Linux; plus full support for Outlook (Windows and Mac) and many other IMAP or POP compliant email clients.Starting Price: $36.50 -
39
MailSite Fusion
Rockliffe Systems
MailSite Fusion is a Windows email, calendar and contact server with over-the-air push to all types of smartphones, Full native Outlook sync, a sophisticated AJAX web client and a calendar and contact sharing server, which can synchronize and publish to many other clients. MailSite has been voted in the top 3 mail server products by readers of Windows IT Pro Magazine 3 years running. Your email services are critical to your organization. So you need to be sure that you select a quality product, from a company with a proven track record in communication software. So, why this mail server? Because Rockliffe understands your concerns, we have been specializing in developing and refining our email server and email security software for business and service providers since 1995. Built from the ground up to be fast, stable and secure, MailSite Fusion is ready to meet the needs and requirements that matter to you most.Starting Price: $90 per year -
40
Antagonist
Antagonist
Antagonist is a Dutch hosting and domain registration platform built as a complete package for websites and email, combining the flexibility and technical advantages of VPS with the simplicity of shared web hosting. Its hosting packages are designed for a successful website start and growth, with room for HTML sites, WordPress, other CMS options, applications, webshops, and business websites. Each package runs in a safe, isolated container with guaranteed processor power and memory reserved for the user, helping protect privacy and keep websites fast and stable without interference from others. Antagonist uses high-quality SSD storage, frequently used data in server RAM, and a 10 Gigabit network for fast website performance. Users can host websites, manage email, add unlimited domain aliases or redirects, create subdomains, choose PHP versions, use unlimited databases, access online webmail, install in one click, and work with WordPress or another CMS when needed.Starting Price: €4.99 per month -
41
RenderDotC
Dot C Software
Dot C Software's flagship product, RenderDotC, is a world class photorealistic renderer designed to meet the demands of special effects for film. The primary reason people give for choosing RenderDotC is its favorable price per performance ratio. Moreover, RenderDotC scores high marks on everything that matters for a production renderer. Images produced with RenderDotC possess that indescribable yet beautiful quality that some people refer to as "the RenderMan look". All phenomena that are prone to aliasing artifacts are effectively anti-aliased and noise is kept to a minimum. RenderDotC was designed in the 1990's to take advantage of the current hardware and software technologies. Its CPU and memory performance is unsurpassed by all renderers in its class. There are hundreds of details to get right when developing a renderer and that only comes with maturity. RenderDotC is priced competitively for both the film and broadcast markets.Starting Price: $500 -
42
Apache James
The Apache Software Foundation
James stands for Java Apache Mail Enterprise Server. It has a modular architecture based on a rich set of modern and efficient components which provides at the end complete, stable, secure, and extendable Mail Servers running on the JVM. Create your own personal solution of email treatment by assembling the components you need thanks to the Inversion of Control mail platform offered and go further customizing filtering and routing rules using James Mailet Container. The Apache James project wires together the different libraries composing James to provide running services, ready to download on the Apache mirrors.Starting Price: Free -
43
Mutant Mail
Fresent
Never miss an important email again! Manage all your email IDs in one inbox with our Email Router. Struggling with multiple Emails? Overcome the headache of managing multiple Email ids with our privacy-focused, server-side solution Mutant Mail. Problem: Imagine having 5 domains, with 5 Email IDs each (admin, support, help, legal, contact). That's 25 Email IDs. Do we want to log in to every mailbox to keep the domain persona? Answer: Receive, Reply & Send all Emails for your Domains from your free Gmail account(or any Email account) and save on Email Hosting. Skip the Email client setup headache! Forget about Credentials, SMTP, IMAP/POP for every Email id with Mutant Mail. With Mutant Mail service you can receive, send and reply all using one mailbox. Spoof-proof your Emails with complimentary DMARC Report. PGP/GPG encryption. Buffer / Batch your emails.Starting Price: $2.99 per month -
44
MacSonik Gmail Backup Tool
MacSonik
Gmail Backup Tool for Mac is a perfect utility that effortlessly creates the backup of Gmail mailboxes and saves it to a different format like PST, PDF, MBOX, MSG on macOS. Even the application directly import Gmail emails to Office 365, Yahoo Mail, Hotmail, IMAP, etc. It allows users to backup the emails from the Gmail account on MAC OS X. Import Gmail emails to Yahoo, Thunderbird, Amazon Webmail, Icloud, Zoho Mail, etc. Option to set up a backup schedule of Gmail emails. It privileges a feature to free up the server space after the backup of emails. The maximum number of users are looking for a solution to backup their complete Gmail mailboxes in PST formats on a mockup of their MacOS. Here, Gmail Backup Tool for Mac is a top-rated application that helps users mail mailboxes in PST format. Gmail Backup Tool for Mac allows users to import their emails from Gmail to another Gmail account without losing a single piece of data.Starting Price: $49 one-time payment -
45
DMARCTrust
DMARCTrust
DMARCTrust is a DMARC monitoring service built for SMBs that don't have an email security expert in-house. Add your domain, get a dedicated reporting address, paste it into your DNS... and we take it from there: reports are parsed automatically, you see every source sending as your domain, with SPF/DKIM alignment and failures that matter. We also watch your DMARC, SPF and BIMI records every 5 minutes and alert you on changes, and we host MTA-STS policies for inbound protection. Built by an ex-Mailjet deliverability engineer, sysadmin since 2005, who got tired of reading aggregate XML by hand for consulting clients. Free for 1 domain, then simple per-domain pricing: no enterprise UI, no pricing traps.Starting Price: Free for 1 domain -
46
Poste.io
analogic
You can have a fully functional mail server installed in a few minutes, mostly waiting for scripts to do the work. The whole package is designed with reasonable defaults to get you up and running quickly, without having to know the internals and without making decisions that could break the email system. User data and configuration is strictly separated from binaries. User database is stored in SQLite database - in file. This makes Poste.io fully compatible with external storage. Migration, backups or updates are therefore very easy and mostly consist of files manipulation. Poste.io has been built from the ground up with security in mind. Internet history is littered with painful security incidents, so we traded old email client compatibility and insecure authentication methods for features that meet today's for features that meet modern security requirements.Starting Price: Free -
47
Proxmox Mail Gateway
Proxmox Server Solutions
Proxmox Mail Gateway is the leading open-source email security solution helping you to protect your mail server against all email threats from the moment they emerge. The flexible architecture combined with the userfriendly, web-based management interface, allows IT professionals and businesses to control all incoming and outgoing emails with ease, and to protect their users from spam, viruses, phishing and trojans. Organizations of any size can easily deploy and implement the anti-spam and anti-virus platform in just a few minutes. The full featured mail proxy is deployed between the firewall and the internal mail server, and allows to control all email traffic from a single platform. Proxmox helps you to easily maintain a secure and professional email communication, ensure business continuity, and gain high business reputation as well as customer satisfaction.Starting Price: €149 per year -
48
Zextras Carbonio
Zextras
Zextras Carbonio is a full-stack digital workplace with an emphasis on data privacy, surpassing traditional email servers. This advanced platform offers unmatched deployment flexibility, scalability, and customization, creating a robust and private digital workspace. Key features include an advanced email server with anti-spam and antivirus capabilities, empowering administrators with server-side tools. Clients enjoy a rich webmail interface, native iOS and Android apps, and collaborative document editing with extensive sharing. Server-side features encompass real-time backup, advanced storage management, specialized administrative profiles, secure authentication, high availability, and EAS support. Zextras Carbonio stands out for its commitment to a private digital workplace, offering high customization and scalability. Absolute sovereignty ensures compliance with data privacy regulations, making it ideal for safeguarding sensitive data.Starting Price: Custom -
49
Scalix
Scalix
Offer a high value Outlook experience with push email, PIM, group calendaring, free/busy services, public folders, delegation, and more. Increase margins with lower server counts and compelling subscription pricing. Reduce your licensing costs and leverage your teams' existing skills with a Linux-based platform. Scalix starter packs are robust, single-server messaging solutions designed to provide smaller businesses and organizations with a full featured email and collaboration solution. Scalix small business edition is our single-server solution designed for small businesses. It includes a rich package of business functionality including a means to instantly recover deleted items on a user-specific basis, wireless device support and more. -
50
Firefox Relay
Mozilla
Firefox Relay email aliases protect your real email address from public view, automatically forwarding emails to your real inbox. Now you can receive only the emails you want in your inbox. Sign up with your Firefox account to get started. Share Relay email aliases instead of your real email address to protect your email inbox, as well as your identity. As you browse, the Relay icon will appear where sites ask for your email address. Sign in to the Relay dashboard to keep track of the aliases you’ve created. Relay will forward messages to your email address. If an alias gets spam or unwanted messages, you can block all messages or even delete the alias, right from the dashboard.Starting Price: $0.99 per month