mta-sts

Fullstack, security focused, personal mail server based on OpenSMTPD for OpenBSD

Command line utility and a Node.js library for email authentication

hMailServer 6.3 — modernized email server for Windows and linux (SMTP/IMAP/POP3, OpenSSL 4, MTA-STS, DANE/DNSSEC, ARC, ACME, REST API). AGPLv3.

Daemon which provides TLS client policy for Postfix via socketmap, according to domain MTA-STS policy

DMARC & SMTP-TLS Reports processor and visualizer and BIMI file hoster

📩 Template to host an MTA Strict Transport Security (MTA-STS) policy on GitHub Pages.

PowerShell Module for checking SPF, DKIM and DMARC-record.

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

Lightweight MTA-STS + DANE/TLSA resolver and TLS policy server for Postfix, prioritizing DANE.

Perl script designed to be used by Exim MTA for MTA-STS compliance.

A PowerShell module to test and explain all facets of a domain's email records.

Template repository for hosting MTA-STS (.well-known/mta-sts.txt) on GitHub Pages.

DNS security audit tool — analyze DMARC, SPF, DKIM, MX, MTA-STS, TLS-RPT, BIMI, DNSSEC, and DMARC DNS Tree Walk per dmarcbis.

Stupid. Simple. TLS Report monitoring. Intended to be used with MTA-STS or DANE, for simplified reporting.

Generate human readable DMARC and TLS-RPT reports from email reports.

Robin MTA Server and Tester is a development, debug and testing tool for MTA architects.

Free tool to check if your domain is vulnerable to email spoofing (SPF, DKIM, DMARC, MTA-STS)

MX, SPF, DKIM and DMARC records with MTA-STS policy for email hosted by Fastmail

Rust library and utility to parse SMTP TLS Reports (RFC8460)

A serverless solution to host mta-sts.txt with GitHub via Netlify, and deploy your policy in DNS