SMTP Senpai

SMTP Senpai

MailSenpai
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+

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About

Gemmein turns an app your AI builds in ChatGPT or Claude into a real business. Your AI writes the app; Gemmein runs the rest: sign-in, each customer’s data kept apart, payments and your own domain. Customers sign in with a code sent to their email, so there are no passwords to forget, reset or leak. Subscriptions, one-off payments and credit packs are paid straight into the Stripe account you connect. Sign-in codes, receipts and notices are sent from your own domain, and your AI drafts replies to customer emails for you to approve. One app runs on the web, iPhone, Android and Mac. Every Live change waits for your approval. Building is free, with no card until you go live. Starting price: $29 / month Pricing details: Build: $0, no card until you go live. Launch: $29/month (up to 5 apps). Run a business: $79/month (up to 10 apps). Grow: $199/month (up to 25 apps). One flat price per account. Annual billing: 2 months off. Free version: Yes. Building is free. Free trial: No. Le

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

Solo developers building AI-powered products

Audience

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

Support

Phone Support 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 Not Supported

API

Offers API Supported

Screenshots and Videos

No images available

Screenshots and Videos

Pricing

$29/month
up to 5 live apps on this plan.
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

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

Review this Software

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

Gemmein
Founded: 2026
United Kingdom
gemmein.com/r/dir

Company Information

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

Alternatives

Alternatives

SMTP.com

SMTP.com

Ziff Davis
SMTP Senpai

SMTP Senpai

MailSenpai
SendGrid

SendGrid

Twilio SendGrid

Categories

Serverless 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.

Serverless Features

API Proxy Not Supported
Application Integration Not Supported
Data Stores Supported
Developer Tooling Supported
Orchestration Not Supported
Reporting / Analytics Not Supported
Serverless Computing Supported
Storage Supported

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

AssemblyAI Supported
Claude Code Supported
Codex CLI Supported
CrewAI Supported
Deepgram Supported
Django Not Supported
ElevenLabs Supported
LangGraph Supported
Laravel Not Supported
Magento Not Supported
Node.js Not Supported
OpenAI Supported
PrestaShop Not Supported
Replicate Supported
Runway Supported
Stripe Supported
Supabase Not Supported
WooCommerce Not Supported
WordPress Not Supported
n8n Not Supported

Integrations

AssemblyAI Not Supported
Claude Code Not Supported
Codex CLI Not Supported
CrewAI Not Supported
Deepgram Not Supported
Django Supported
ElevenLabs Not Supported
LangGraph Not Supported
Laravel Supported
Magento Supported
Node.js Supported
OpenAI Not Supported
PrestaShop Supported
Replicate Not Supported
Runway Not Supported
Stripe Not Supported
Supabase Supported
WooCommerce Supported
WordPress Supported
n8n Supported
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