Scalable Reliable Mail Transfer Agent — high-performance MTA in Go with per-domain queues, DKIM/SPF/DMARC, bounce handling, rate limiting, and web dashboard. Modern alternative to Postfix and Exim.
-
Updated
May 22, 2026 - Go
Scalable Reliable Mail Transfer Agent — high-performance MTA in Go with per-domain queues, DKIM/SPF/DMARC, bounce handling, rate limiting, and web dashboard. Modern alternative to Postfix and Exim.
A self-hosted mail server written from scratch in Go — SMTP, IMAP, POP3, DKIM/SPF/DMARC, outbound queue, admin panel and webmail in a single binary.
Lightweight, high-performance SMTP Smart-Host Relay and Direct Mailer written in Go
SMTP relay that sends mail through Microsoft Graph API instead of SMTP AUTH. Lets printers, scanners and apps send via Microsoft 365 / Exchange Online with OAuth. Let's Encrypt TLS, web admin portal with Entra ID sign-in, per-host rules and optional SMTP login. Single Go binary. Smtp relay for microsoft 365
To associate your repository with the postfix-alternative topic, visit your repo's landing page and select "manage topics."