Crammd

isync is a command line application which synchronizes mailboxes; currently Maildir and IMAP4 mailboxes are supported.New messages, message deletions and flag changes can be propagated both ways. isync is suitable for use in IMAP-disconnected mode.Synchronization is based on unique message... Platforms: C and C plus plus

GNU SASL is an implementation of the Simple Authentication and Security Layer framework and a few common SASL mechanisms. SASL is used by network servers (e.g., IMAP, SMTP) to request authentication from clients, and in clients to authenticate against servers. GNU SASL consists of a library... Platforms: Mac

mpop is a POP3 client: it retrieves mail from POP3 mailboxes. Features include: Header based mail filtering: filter junk mail before downloading it. Delivery to mbox files, maildir folders, or a mail delivery agent (MDA). Delivery with SMTP is possible by using an appropriate MDA, for example... Platforms: *nix

esmtp is a user configurable relay-only Mail Transfer Agent (MTA) with a sendmail compatible syntax. It's based on libESMTP supporting the AUTH (including the CRAM-MD5 and NTLM SASL mechanisms) and the StartTLS SMTP extensions. Features These are the esmtp features: fully sendmail command... Platforms: *nix