starttls

Transparent SSL/TLS interception

An Internet scale, blazing fast SSL/TLS scanner ( non-blocking, event-driven )

Scan domains and return data based on trustworthy email best practices

Internet standards compliance test suite

proxy poc implementation of STARTTLS stripping attacks

A TLS MITM proxy that intercepts, inspects, and manipulates encrypted traffic, with support for TLS upgrades like STARTTLS, PostgreSQL, and more.

The highly customizable ruby SMTP-Server and SMTP-Service library with builtin support for AUTH and SSL/STARTTLS, 8BITMIME and SMTPUTF8, IPv4 and IPv6 and additional features.

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

🛠 Proof-of-concept code for Heartbleed a.k.a. CVE2014-0160 with STARTTLS support for various protocols

A minimalist client for sending mail direct to recipient's MX

'DANE for SMTP' wiki

Check expiry dates of local and remote SSL certificates

(START-)TLS-capable transport using OpenSSL for asyncio

TLSAudit is a utility for auditing TLS (including SSL and STARTTLS) security settings.

Application that creates a dashboard for scans using the Internet.nl API.

Small Python Script for Testing TLS/SSL Functionality of Mail Server

TLS handshake benchmarking tool that supports TCP and SMTP

SMTP pure PHP Mail Daemon (!!! Alpha project !!!)

An E-Mail Interface for Nerds

This is a tutorial to make your own interactive app that sends emails.