Dovecot is a mail server whose major goals are security and extreme reliability. It tries very hard to handle all error conditions and verify that all data is valid, making it nearly impossible to crash. It should also be pretty fast, extensible, and portable.
Dovecot can work with standard mbox, Maildir, and its own experimental native high-performance dbox formats. It is fully compatible with UW IMAP and Courier IMAP servers’ implementation of them, as well as mail clients accessing the mailboxes directly.
Dovecot also includes a Mail delivery agent (called Local delivery agent in Dovecot’s documentation), with optional Sieve filtering support.
Dovecot is among the highest performing IMAP servers while still supporting the standard mbox and Maildir formats. The mailboxes are transparently indexed, which gives Dovecot its good performance while still providing full compatibility with existing mailbox handling tools.
- Complete IMAP4rev1 and POP3 support.
- IPv6, SSL and TLS are supported.
- Supports multiple commonly used IMAP extensions, including SORT, THREAD and IDLE.
- Support for ACL files.
- Maildir++ quota is also supported.
- Standards compliant. Dovecot v1.1 passes all IMAP server standard compliancy tests while most other servers fail many of them.
- Self-optimizing indexes.
- Self-healing – tries to fix most of the problems it notices by itself, such as broken index files.
- Allows mailboxes and their indexes to be modified by multiple computers at the same time, while still performing well. This means that Dovecot works with NFS and clustered filesystems.
- User authentication is extremely flexible and feature rich, supporting many different authentication databases and mechanisms.
- Postfix 2.3+ and Exim 4.64+ users can do SMTP authentication directly against Dovecot’s authentication backend without having to configure it separately.
- Supports easy migration from many existing IMAP and POP3 servers, allowing the change to be transparent to existing users.
- Supports workarounds for several bugs in IMAP and POP3 clients.
- Design and implementation is highly focused on security.
- Easily extensible. Plugins can add new commands, modify existing behavior, add their own data into index files or even add support for new mailbox formats.
|New to Linux? Read our Linux for Starters series. We start right at the basics and teach you everything you need to know to get started with Linux.|
|The largest compilation of the best free and open source software in the universe. Each article is supplied with a legendary ratings chart helping you make informed decisions.|
|Hundreds of in-depth reviews offering our unbiased and expert opinion on software. We offer helpful and impartial information.|
|Alternatives to Google's Products and Services examines your options to migrate from the Google ecosystem with open source Linux alternatives.|
|Alternatives to Microsoft's Products and Services recommends open source Linux software.|
|Alternatives to Adobe Cloud looks at free and open source alternatives to products available from Adobe Cloud's subscription service.|
|Alternatives to Apple recommends free and open source alternatives to Apple's proprietary world.|
|Alternatives to Corel surveys alternatives to Corel's range of graphics processing products and other software applications.|
|Getting Started with Docker helps you master Docker, a set of platform as a service products that delivers software in packages called containers.|
|Essential Linux system tools focuses on small, indispensable utilities, useful for system administrators as well as regular users.|
|Linux utilities to maximise your productivity. Small, indispensable tools, useful for anyone running a Linux machine.|
|Home computers became commonplace in the 1980s. Emulate home computers including the Commodore 64, Amiga, Atari ST, ZX81, Amstrad CPC, and ZX Spectrum.|
|Now and Then examines how promising open source software fared over the years. It can be a bumpy ride.|
|Linux at Home looks at a range of home activities where Linux can play its part, making the most of our time at home, keeping active and engaged.|
|Linux Candy reveals the lighter side of Linux. Have some fun and escape from the daily drudgery.|
|Best Free Android Apps. We showcase free Android apps that are definitely worth downloading. There's a strict eligibility criteria for inclusion in this series.|
|These best free books accelerate your learning of every programming language. Learn a new language today!|
|These free tutorials offer the perfect tonic to our free programming books series.|
|Stars and Stripes is an occasional series looking at the impact of Linux in the USA.|