spf

A fast, highly extensible, and event driven SMTP server

Simple script that checks a domain for email protections

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

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

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

Scan domains and return data based on trustworthy email best practices

A parser for SPF and DMARC DNS records

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

Internet standards compliance test suite

A Go library for DKIM, DMARC and Authentication-Results

Postfix SMTP relay docker image

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

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

Library containing Email related implementations in Elixir : dkim, spf, dmark, mimemail, smtp

Convert dmarc reports from xml to human-readable formats

Artisanal inbound emails for every web app using nodejs

Simple library to check an IP address against a domain's SPF record

Postfix SRS forwarding agent

ThunderSec is a security plugin for Mozilla Thunderbird that creates several pieces of additional security functionality, including DNSBL, RBL, SURBL, DKIM and SPF.

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

Setup guide for Office 365 Administrators who are unable to use ATP to configure SPF, DKIM and DMARC.

Ruby SPF Parser

Compact large SPF chains into flat blocks of IP addresses

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

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

Sender Policy Framework

Hermes Secure Email Gateway is a Free Open Source Ubuntu 18.04 Server based Email Gateway that provides Spam, Virus and Malware protection, full in-transit and at-rest email encryption as well as email archiving. It features the latest email authentication techniques such as SPF, DKIM and DMARC.

Simple script that checks a domain for email protections

Express middleware that handles SPF requests