sqwebmail - 6.2.9+1.4.1-3+deb13u1 main

The Courier mail transfer agent (MTA) is an integrated mail/groupware
server based on open commodity protocols, such as ESMTP, IMAP, POP3, LDAP,
TLS, and HTTP. Courier provides ESMTP, IMAP, POP3, webmail, and mailing list
services within a single, consistent, framework.
.
This package contains the SqWebMail webmail server, which
provides access to local mailboxes in Maildir format.