✉️ 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

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 standards compliance test suite

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.