GNU Mailutils is a rich and powerful protocol-independent mail framework. It contains a series of useful mail libraries, clients, and servers. These are the primary mail utilities for the GNU system.
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The central library is capable of handling electronic mail in various mailbox formats and protocols, both local and remote. Specifically, this project contains a POP3 server, an IMAP4 server, and a Sieve mail filter. It also provides a POSIX `mailx' client, and a collection of other handy tools.
The GNU Mailutils libraries supply an ample set of primitives for handling electronic mail in programs written in C, C++, Python or Scheme. [Less]