Dovecot: IMAP, LMTP, accounts, Sieve and quotas

1 h Python 3.12 (Debian, git, pip) Versions Debian 12 (Dovecot 2.3), Debian 13 (Dovecot 2.4), Ubuntu 24.04 (2.3), Rocky 9 (2.3)

Objective

Put Dovecot at the center of the mailboxes: it stores the mail that Postfix delivers to it (LMTP), authenticates users, filters at delivery time (Sieve), limits mailbox size (quotas) and serves mailboxes to clients (IMAP).

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