Comment 2 for bug 652519

Hello ilio, thank you for taking the time to file this bug report and work with us to make Ubuntu better!

This may be an issue with the configuration of the system. This error is rather telling:

Setting up dovecot-common (1:1.2.9-1ubuntu7) ...
You already have ssl certs for dovecot.
update-rc.d: warning: dovecot stop runlevel arguments (1) do not match LSB Default-Stop values (0 1 6)
 * Starting IMAP/POP3 mail server dovecot
 * Starting IMAP/POP3 mail server dovecot Fatal: listen(0.0.0.0, 2000) failed: Address already in use
                                                                         [fail]
Setting up dovecot-imapd (1:1.2.9-1ubuntu7) ...
 * Restarting IMAP/POP3 mail server dovecot
 * Restarting IMAP/POP3 mail server dovecot Fatal: listen(0.0.0.0, 2000) failed: Address already in use
Setting up dovecot-pop3d (1:1.2.9-1ubuntu7) ...
 * Restarting IMAP/POP3 mail server dovecot

Is the system setup to listen on port 2000? Is there maybe an old process already listening on port 2000?

Try

sudo fuser -v -n tcp 2000/tcp

And paste the output here if it shows any processes already listening on that port.

If there's nothing listening there, just try

sudo apt-get -f install

and it should finish any configuration steps necessary.

Marking Incomplete pending respond from ilio.