✉️ Composable all-in-one mail server.

A fast, highly extensible, and event driven SMTP server

An email spoofing testing tool that aims to bypass SPF/DKIM/DMARC and forge DKIM signatures.🍻

Spoofy is a program that checks if a list of domains can be spoofed based on SPF and DMARC records.

Stalwart SMTP Server

SPFtoolbox is a Javascript and PHP app to look up DNS records such as SPF, MX, Whois, and more

A parser for SPF and DMARC DNS records

Convert dmarc reports from xml to human-readable formats

Scan domains and return data based on trustworthy email best practices

Internet standards compliance test suite

Shell scripts for taming the SPF (Sender Policy Framework) records in order to fight 10-maximum-DNS-look-ups limit.

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

Internet.nl toolbox - how-to's for modern mail security standards (DMARC, DKIM, SPF and DANE)

A Laravel package to check if you can send e-mail through a given mailserver in name of a given e-mail address

Postfix SMTP relay docker image

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

A web application that allows the users to check whether their SPF, DMARC and DKIM configuration is set up correctly.

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

A set of browser-based DNS tools for DigitalOcean Community.

A simple, open source Mac OS app for presentations on low-contrast monitors.