A cross-platform .NET library for IMAP, POP3, and SMTP.
Simple API, Complex Emails (Jakarta Mail smtp wrapper)
en-crypt, de-crypt, si-gn, ve-rify - smime, pdf, xades and plain files in pure python
A C/C++ MIME creation and parser library with support for S/MIME, PGP, and Unix mbox spools.
ACME (RFC 8555) compatible implementation, connecting to Active Directory Certificate Services (ADCS)
#安全#.NET email library and proxy supporting IMAP, POP3, and SMTP with S/MIME and PGP.
#安全#🔐 📧 Encrypts WordPress emails using OpenPGP or S/MIME with a familiar API.
API specification for gematik's KIM - a secure Email standard, which enables the exchange of information and payload in the German healthcare sector.
cryptlib security toolkit
PKI Consortium Community Discussions
View and compose SMIME encrypted messages in Outlook Web App on Linux
a purly Peer-to-Peer instant messenger client