Nein. Das ist wie gesagt das Problem.
Univention:
root@com01:~# apt search dovecot-
dovecot-auth-lua/ucs501,now 1:2.3.4.1-5+deb10u6 amd64 [installiert]
dovecot-core/ucs501,now 1:2.3.4.1-5+deb10u6 amd64 [Installiert,automatisch]
dovecot-dev/ucs501 1:2.3.4.1-5+deb10u6 amd64
dovecot-gssapi/ucs501 1:2.3.4.1-5+deb10u6 amd64
dovecot-imapd/ucs501,now 1:2.3.4.1-5+deb10u6 amd64 [Installiert,automatisch]
dovecot-ldap/ucs501,now 1:2.3.4.1-5+deb10u6 amd64 [Installiert,automatisch]
dovecot-lmtpd/ucs501,now 1:2.3.4.1-5+deb10u6 amd64 [Installiert,automatisch]
dovecot-lucene/ucs501 1:2.3.4.1-5+deb10u6 amd64
dovecot-managesieved/ucs501,now 1:2.3.4.1-5+deb10u6 amd64 [Installiert,automatisch]
dovecot-mysql/ucs501 1:2.3.4.1-5+deb10u6 amd64
dovecot-pgsql/ucs501 1:2.3.4.1-5+deb10u6 amd64
dovecot-pop3d/ucs501,now 1:2.3.4.1-5+deb10u6 amd64 [Installiert,automatisch]
dovecot-sieve/ucs501,now 1:2.3.4.1-5+deb10u6 amd64 [Installiert,automatisch]
dovecot-solr/ucs501 1:2.3.4.1-5+deb10u6 amd64
dovecot-sqlite/ucs501 1:2.3.4.1-5+deb10u6 amd64
dovecot-submissiond/ucs501 1:2.3.4.1-5+deb10u6 amd64
fusiondirectory-plugin-dovecot-schema/ucs501 1.2.3-4+deb10u1 all
mysqmail-dovecot-logger/ucs501 0.4.9-10.2+b1 amd64
Ubuntu 20.04:
root@lt001:/home/s.gehr# apt search dovecot-
v dovecot-abi-2.3.abiv7 -
p dovecot-antispam - Dovecot plugins for training spam filters
p dovecot-auth-lua - secure POP3/IMAP server - Lua authentication plugin
v dovecot-common -
p dovecot-core - Sicherer POP3-/IMAP-Server - Systemkern
p dovecot-dev - sicherer POP3/IMAP-Server - Headerdateien
p dovecot-gssapi - Sicherer POP3-/IMAP-Server - GSSAPI-Unterstützung
p dovecot-imapd - sicherer POP3/IMAP-Server - IMAP-Daemon
p dovecot-ldap - secure POP3/IMAP server - LDAP support
p dovecot-lmtpd - secure POP3/IMAP server - LMTP server
p dovecot-lucene - secure POP3/IMAP server - Lucene support
p dovecot-managesieved - secure POP3/IMAP server - ManageSieve server
p dovecot-mysql - secure POP3/IMAP server - MySQL support
p dovecot-pgsql - secure POP3/IMAP server - PostgreSQL support
p dovecot-pop3d - sicherer POP3/IMAP-Server - POP3-Daemon
p dovecot-sieve - secure POP3/IMAP server - Sieve filters support
p dovecot-solr - secure POP3/IMAP server - Solr support
p dovecot-sqlite - secure POP3/IMAP server - SQLite support
p dovecot-submissiond - secure POP3/IMAP server - mail submission agent
p fusiondirectory-plugin-dovecot-schema - LDAP schema for FusionDirectory dovecot plugin
p mysqmail-dovecot-logger
Ein Paket dovecot-lua existiert hier nicht