mime

neomutt

+3

✉️ Teaching an Old Dog New Tricks -- IRC: #neomutt on irc.libera.chat

MailKit

+3

A cross-platform .NET library for IMAP, POP3, and SMTP.

mailparser

+1

Decode mime formatted e-mails

MimeKit

+1

A .NET MIME creation and parser library with support for S/MIME, PGP, DKIM, TNEF and Unix mbox spools.

mimetype

+1

A Go package for media type and file extension detection, based on magic numbers