Dovecot Community Edition (CE)
Dovecot is an open source email server for Linux/UNIX-like systems, written with security primarily in mind. Dovecot is an excellent choice for both small and large installations. It's fast, simple to set up, requires no special administration and it uses very little memory.
Dovecot supports the IMAP (RFC 3501), POP3 (RFC 1939), LMTP (RFC 2033), and ManageSieve (RFC 5228) mail protocols.
Dovecot Pro
Dovecot Pro is a commercial software product of Open-Xchange.
Dovecot Pro implements Palomar, a cloud-native architecture that allows for Dovecot to be highly available, scalable, and stateless.
Dovecot Pro uses Dovecot Core as part of the Palomar architecture.
For full details and documentation on Dovecot Pro, visit Dovecot Pro.
Dovecot Community Edition
Dovecot Community Edition (CE) is the open source version of Dovecot.
Dovecot CE is designed for use on a single server. There is no support or maintenance for multiple Dovecot servers to interact with each other.
This site fully documents Dovecot CE and its behavior.
Dovecot CE is also referred to as "Dovecot Core" in this documentation.
To get started, see https://repo.dovecot.org/ and quick configuration.
Please use the Dovecot mailing list for questions about Dovecot CE.