andreasschulze

openssl-demo-server

Example program to implement a TLS server for demonstration and educational purposes.

signing-milter

signing-milter enables you to s/mime sign an ordinary mail while passing a MTA

dmarc_dsn_processor

process dsn messages for sent DMARC reports

acme.sh

A pure Unix shell script implementing ACME client protocol

certspotter

Certificate Transparency Log Monitor

check_dns_respond_as_expected

check_dns_respond_as_expected

check_mx_all_flavours

check TLS and DANE on all mx hosts of the given domain

scmdhttpd

Same/Simple Content for Multiple/Many Domains

dkim_verifier

DKIM Verifier Extension for Mozilla Thunderbird

dnsviz

incron

cron-like daemon which handles filesystem events

ldns

LDNS is a DNS library that facilitates DNS tool programming

ldns-zone-digest

Implementation of Message Digests for DNS Zones using the ldns library.

liboqs

C library for prototyping and experimenting with quantum-resistant cryptography

libspf2

Implementation of the Sender Policy Framework for SMTP authorization

mailheadercheck

This milter checks some headers (From, Subject, Date) for RFC validity.

nginx-auth-ldap

LDAP authentication module for nginx

nsd

The NLnet Labs Name Server Daemon (NSD) is an authoritative, RFC compliant DNS nameserver.

OpenARC

Open source ARC implementation

OpenDKIM

OpenDMARC

oqs-provider

OpenSSL 3 provider containing post-quantum algorithms

smf-spf

It's a lightweight, fast and reliable Sendmail milter that implements the Sender Policy Framework

sts-mate

An MTA-STS policy server/reverse proxy. Uses LetsEncrypt to fetch certs for your host.

SubdomainSleuth

Scanner to identify dangling DNS records and subdomain takeovers

tlsrpt

A set of libraries and tools to implement TLSRPT reporting into an MTA and to generate and submit TLSRPT reports.

unbound

Unbound is a validating, recursive, and caching DNS resolver.

unbound-manual

The Official Unbound User Manual

workflows

playing with Github workflows

yazvs

Yet Another Zone Validation Script