An email and SMTP testing tool with API for developers
-
Updated
Jun 20, 2026 - Go
#
smtp-relay
Here are 65 public repositories matching this topic...
Simple Golang SMTP relay/proxy server
-
Updated
Jun 24, 2026 - Go
The first Open-Source high-performance MTA developed from the ground-up for high-volume email sending environments.
email smtp mta smtp-server email-template mta-server smtpd smtp-mail smtp-relay smtp-mailer email-server
-
Updated
Jun 25, 2026 - Rust
The collaborative Open Source successor to qmail and netqmail
-
Updated
Jun 22, 2026 - C
Self-hosted email gateway between your apps and a transactional mail provider (Postmark, Resend, Mailgun, AWS SES, or outbound-SMTP). Three ingress shapes (HTTP form, HTTP API, SMTP). One Docker container, one TOML config.
go docker email self-hosted postmark homelab email-gateway smtp-relay transactional-email mail-gateway
-
Updated
Jun 15, 2026 - Go
SimpleRelay - Self-hosted SMTP relay with web dashboard, DNS validation, and per-sender access control (FastAPI/Postfix/Docker)
docker docker-compose email postfix self-hosted email-sender smtp smtp-relay email-service smtp-relay-server
-
Updated
Jun 21, 2026 - Python
Lightweight SMTP relay Docker image using msmtpd
-
Updated
Jun 22, 2026 - Dockerfile
Simple mail relay that can take unauthenticated SMTP emails (e.g. over port 25) and relay them to authenticated, TLS-enabled SMTP servers.
-
Updated
Nov 20, 2025 - Go
SpamPD - Spam Proxy Daemon. A spam-filtering SMTP/LMTP proxy server using SpamAssassin in Perl. Since 2002.
spam perl perl-module spamassassin anti-spam mail-filter spam-filtering smtp-relay postfix-helper message-scanning spampd
-
Updated
Feb 8, 2026 - Perl
Postfix Docker Image with great flexibility
-
Updated
Jan 28, 2026 - Shell
SMTP Open Relay Exploitation
-
Updated
Nov 23, 2020 - HTML
AWS-hosted personal email system: sending, receiving, storage, and forwarding (relaying). `notmuch` client. JMAP server WIP.
-
Updated
Jun 24, 2026 - Rust
SMTP Relay service for Windows
-
Updated
May 29, 2026 - C#
SMTP server to use for forwarding messages
-
Updated
Jun 24, 2026 - Go
-
Updated
Dec 15, 2025 - Go
Lightweight self-hosted mail server with SMTP/IMAP, catch-all mailboxes, multi-domain hosting, Web admin, DKIM/TLS, DNS diagnostics, Cloudflare DDNS, and SMTP relay.
go docker golang ipv6 email sqlite imap ddns self-hosted smtp spf dkim webmail sqlite3 mail-server dmarc catch-all dns-diagnostics smtp-relay cloudflare-ddns
-
Updated
May 13, 2026 - Go
PHP SMTP Mailer library implemented by socket
-
Updated
Jan 5, 2024 - PHP
Docker compose for running Uptime Kuma and sending notifications via NTFY and Email
-
Updated
Jan 15, 2025
Improve this page
Add a description, image, and links to the smtp-relay topic page so that developers can more easily learn about it.
Add this topic to your repo
To associate your repository with the smtp-relay topic, visit your repo's landing page and select "manage topics."