✉️ Composable all-in-one mail server.

Convert dmarc reports from xml to human-readable formats

🔏 A Go library and tools for DKIM, DMARC and Authentication-Results

Scan domains and receive advice based on their BIMI, DKIM, DMARC, and SPF records

🛡️ A lightweight, self-hosted DMARC report parser with a beautiful Vue.js dashboard. Single-binary deployment with IMAP integration, SQLite storage, and RFC 7489 compliance. Built with Go and Vue 3 - no external dependencies required.

Another utility to analyze state of deployment of security-related email protocols.

Postfix SRS forwarding agent

Parse SPF record and determine if client IP is allowed to send email.

SPF (Sender Policy Framework) implementation in Go [mirror]

Command-line tool to detect email spoofing vulnerabilities by analyzing SPF and DMARC DNS records. Supports single and bulk domain checks with multiple output formats.

Sender Policy Framework

Go package for SPF record check

SPF (Sender Policy Framework) for Go

SRS Sender Rewriting Scheme Go/Golang package

Tool for checking SPF records for domain names

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.

Modern, composable all-in-one mail server in Go with SMTP, IMAP, CalDAV, CardDAV, DKIM, SPF, DMARC, antivirus, and anti-spam

A Go CLI tool to flatten DNS SPF records and output a list of IP addresses.

A high-performance SPF (Sender Policy Framework) policy server for Postfix with tolerant heuristics to reduce false positives from misconfigured but legitimate senders.

Mirror only. OpenSMTPD SPF filter.