Postfix is Wietse Venema's mailer that started life as an alternative to the widely-used Sendmail program. Postfix attempts to be fast, easy to administer, and secure, while at the same time being
... [More] sendmail compatible enough to not upset existing users. Thus, the outside has a sendmail-ish flavor, but the inside is completely different. [Less]
Fetchmail is a full-featured, robust, well-documented remote-mail retrieval and forwarding utility intended to be used over on-demand or permanent dynamic-address TCP/IP links (such as SLIP or PPP
... [More] connections). It supports every remote-mail protocol now in use on the Internet: POP3, IMAP4r1, ETRN, and ODMR, all with various authentication variants, and TLS/SSL security with certificate verification.
Fetchmail retrieves mail from remote mail servers and forwards it via SMTP, LMTP, or to a local delivery agent. Mail can then be read by normal mail software such as mutt or alpine. This setup allows all your system MTA's filtering, forwarding, and aliasing facilities to work just as they would on normal mail. [Less]
OfflineIMAP is a bidirectional IMAP/Maildir synchronization tool aimed to augment your mail reader. With OfflineIMAP, you can read the same mailbox from multiple computers and have your changes
... [More] (deletions, flags, etc.) be automatically reflected on all computers. It also lets you read mail offline (perhaps on a laptop) and synchronize all changes when you get connected again.
You can also use OfflineIMAP to read IMAP mail with mail readers that do not support IMAP, or support it poorly (as most do). [Less]
Pine® - a Program for Internet News & Email - is a tool for reading, sending, and managing electronic messages. Pine was developed by Computing & Communications at the University of Washington.
... [More] Though originally designed for inexperienced email users, Pine has evolved to support many advanced features, and an ever-growing number of configuration and personal-preference options. Pine is available for Unix as well as for personal computers running a Microsoft operating system (PC-Pine). [Less]
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.
... [More] 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]
Heirloom mailx (previously known as nail) is a mail user agent for Unix systems. Highlights are:
* Derived from Berkeley Mail 8.1. An interface like the original Berkeley one is still
... [More] optionally available.
* Is a free implementation of the System V mailx command and features an interface like that by default. [Less]
Kolab is a Groupware Solution for Emails, Appointments, Contacts and more. It supports mixed client environments (Outlook/KDE) because of an open storage format. Any email client speaking standard protocols can be served.