Estou tentando instalar o pacote Citadel mail. Anteriormente, tentei instalar postfix e dovecot , mas depois removê-los com apt-get remove --purge . A instalação para Citadel foi encerrada antes da conclusão, mas com o seguinte
Processing triggers for dovecot-core (1:2.2.22-1ubuntu2.4) ...
Job for dovecot.service failed because the control process exited with error code. See "systemctl status dovecot.service" and "journalctl -xe" for details.
invoke-rc.d: initscript dovecot, action "restart" failed.
● dovecot.service - Dovecot IMAP/POP3 email server
Loaded: loaded (/lib/systemd/system/dovecot.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Wed 2017-11-15 23:58:34 EST; 8ms ago
Docs: man:dovecot(1)
http://wiki2.dovecot.org/
Process: 1257 ExecStart=/usr/sbin/dovecot (code=exited, status=89)
Main PID: 18204 (code=exited, status=0/SUCCESS)
Nov 15 23:58:34 nessus systemd[1]: Starting Dovecot IMAP/POP3 email server...
Nov 15 23:58:34 nessus dovecot[1257]: Fatal: service(pop3) access(/usr/lib/dovecot/pop3) failed: No such file or directory
Nov 15 23:58:34 nessus dovecot[1257]: master: Fatal: service(pop3) access(/usr/lib/dovecot/pop3) failed: No such file or directory
Nov 15 23:58:34 nessus systemd[1]: dovecot.service: Control process exited, code=exited status=89
Nov 15 23:58:34 nessus systemd[1]: Failed to start Dovecot IMAP/POP3 email server.
Nov 15 23:58:34 nessus systemd[1]: dovecot.service: Unit entered failed state.
Nov 15 23:58:34 nessus systemd[1]: dovecot.service: Failed with result 'exit-code'.
dpkg: error processing package dovecot-core (--remove):
subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
dovecot-core
E: Sub-process /usr/bin/dpkg returned an error code (1)
A tentativa de remover dovecot-core novamente com sudo apt-get remove dovecot-core --purge produz o mesmo erro.