starttls

Transparent SSL/TLS interception

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

A TLS MITM proxy for TCP/TLS/UDP traffic, with support for TLS upgrades like STARTTLS, PostgreSQL, and more.

Scan domains and return data based on trustworthy email best practices

Internet standards compliance test suite

proxy poc implementation of STARTTLS stripping attacks

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

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

TLS handshake benchmarking tool that supports TCP and SMTP

An E-Mail Interface for Nerds

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