SMTP Senpai

SMTP Senpai

MailSenpai
+
+

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About

Cloudflare Email Service is a cloud email platform for developers building applications, automated workflows, and AI agents. It combines outbound transactional email delivery with inbound email routing and programmable processing. Applications can send through a Workers binding, REST API, or SMTP, while incoming messages can be routed to Cloudflare Workers for validation, transformation, forwarding, and workflow automation. The service supports domain onboarding with SPF, DKIM, and DMARC configuration, and provides delivery logs and account-level controls. Developers can use it to send notifications, account and transaction messages, receive replies, process inbound messages, and connect email events to application logic. It requires Cloudflare DNS and uses the Cloudflare Workers platform for service access and billing; it is not a hosted mailbox or general-purpose email client.

About

SMTP Senpai is MailSenpai's EU-hosted SMTP relay and REST email API for password resets, order confirmations, notifications and website forms. Connect via SMTP on port 2525 or 587 with STARTTLS, the REST API, or a form endpoint for static sites. DKIM signing uses your verified sender domain, with SPF/DKIM/DMARC checks and automatic suppression of bounced addresses. The permanent free plan includes 5,000 emails per calendar month, up to 200 per day and 30 in the preceding hour, one verified sender domain and 7-day sending logs. No card or expiry. Paid annual plans start at EUR 12.90 per month plus VAT for 10,000 emails per month and 90-day logs. An email report is sent weekly on Monday. Official WordPress and Drupal plugins and open-source SDKs support integration. Written support is available in English and Italian. MailSenpai is the separate newsletter and email marketing platform.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Developers and engineering teams that want to add transactional email sending, inbound email routing, or programmable email processing to applications and automated workflows.

Audience

Developers, SaaS and app makers, web agencies and small businesses that need reliable transactional email

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Supported

API

Offers API Supported

Screenshots and Videos

No images available

Screenshots and Videos

Pricing

$5/month
Email Routing is available on Workers Free and Workers Paid plans, with unlimited inbound emails. Sending to verified destination addresses is free on all plans. Sending to other recipients requires Workers Paid, which includes 3,000 outbound emails per account per month; additional email is $0.35 per 1,000. Workers Paid has a $5 monthly account minimum. Workers usage, including Email Routing Workers, is billed separately under Workers pricing.
Free Version Supported
Free Trial Not Supported

Pricing

Free
Permanent free plan: 5,000 emails per calendar month, up to 200 per day and 30 in the preceding hour; one verified sender domain; 7-day sending logs; no card or expiry. Paid annual plans start at EUR 12.90/month plus VAT for 10,000 emails/month, with 90-day sending logs. The free plan does not automatically become a paid subscription.
Free Version Supported
Free Trial Not Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

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Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

Cloudflare
Founded: 2009
United States
www.cloudflare.com/products/email-service/

Company Information

MailSenpai
Founded: 2016
Italy
en.mailsenpai.com/smtp-senpai/

Alternatives

Alternatives

SMTP.com

SMTP.com

Ziff Davis
Sweego

Sweego

Mindbaz
Postmark

Postmark

ActiveCampaign
SendGrid

SendGrid

Twilio SendGrid
SMTP Senpai

SMTP Senpai

MailSenpai

Categories

Email APIs Supported

Categories

Email APIs Supported
SMTP Supported

SMTP Senpai sends the transactional emails of apps, websites, online stores and business software (sign-ups, password resets, orders, invoices, notifications, contact forms) through standard SMTP on port 2525 or 587, a REST API or a form endpoint. DKIM on your own domain, 90-day sending log, automatic suppression of bounces and complaints, servers and data in the EU.

Transactional Email Features

A/B Testing Not Supported
Contact Database Not Supported
Dynamic Content Not Supported
Email Monitoring Supported
Mailing List Management Not Supported
Reporting/Analytics Supported
Spam Check Not Supported
Template Management Not Supported

Integrations

Cloudflare Workers Supported
Django Not Supported
Laravel Not Supported
Magento Not Supported
Node.js Not Supported
PrestaShop Not Supported
Supabase Not Supported
WooCommerce Not Supported
WordPress Not Supported
n8n Not Supported

Integrations

Cloudflare Workers Not Supported
Django Supported
Laravel Supported
Magento Supported
Node.js Supported
PrestaShop Supported
Supabase Supported
WooCommerce Supported
WordPress Supported
n8n Supported
Claim Cloudflare Email Service and update features and information
Claim Cloudflare Email Service and update features and information
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Claim SMTP Senpai and update features and information