The Cyrus IMAP server differs from other IMAP server implementations in that it is generally intended to be run on sealed servers, where normal users cannot log in.
The Cyrus IMAP server differs from other IMAP server implementations in that it is generally intended to be run on sealed servers, where normal users cannot log in. Users can access mail through the IMAP/IMAPS, POP3/POP3S or KPOP protocols. The private mailbox database design gives the server considerable advantages in efficiency, scalability, and administratability.
imap pop3 mail-server imap-server