Errors installing on Ubuntu 17.04

[Jeff Kletsky]

On 11/20/17 1:58 PM, Someone wrote:

> I've been struggling with this on and off for a while now.  Upon
> attempting to install Dovecot on Ubuntu 17.04 I get the following errors
>
> Selecting previously unselected package dovecot-imapd.
> (Reading database ... 243684 files and directories currently installed.)
> Preparing to unpack .../dovecot-imapd_1%3a2.2.27-2ubuntu2_amd64.deb ...
> Unpacking dovecot-imapd (1:2.2.27-2ubuntu2) ...
> Processing triggers for dovecot-core (1:2.2.27-2ubuntu2) ...
> Processing triggers for ufw (0.35-4) ...
> Setting up dovecot-imapd (1:2.2.27-2ubuntu2) ...
> Creating config file /etc/dovecot/conf.d/20-imap.conf with new version
> Processing triggers for dovecot-core (1:2.2.27-2ubuntu2) ...
> 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 Thu 2017-10-05 14:08:56 BST; 17ms ago
>      Docs: man:dovecot(1)
>            http://wiki2.dovecot.org/
>    Process: 8880 ExecStop=/usr/bin/doveadm stop (code=exited, status=0/SUCCESS)
>    Process: 8885 ExecStart=/usr/sbin/dovecot (code=exited, status=89)
> Main PID: 8729 (code=exited, status=0/SUCCESS)
>
> Oct 05 14:08:56 ash systemd[1]: Starting Dovecot IMAP/POP3 email server...
> Oct 05 14:08:56 ash dovecot[8885]: Error: socket() failed: Address family n…ocol
> Oct 05 14:08:56 ash dovecot[8885]: Error: service(imap-login): listen(::, 1…ocol
> Oct 05 14:08:56 ash dovecot[8885]: master: Error: socket() failed: Address …ocol
> Oct 05 14:08:56 ash dovecot[8885]: Fatal: Failed to start listeners
> Oct 05 14:08:56 ash systemd[1]: dovecot.service: Control process exited, co…s=89
> Oct 05 14:08:56 ash systemd[1]: Failed to start Dovecot IMAP/POP3 email server.
> Oct 05 14:08:56 ash systemd[1]: dovecot.service: Unit entered failed state.
> Oct 05 14:08:56 ash systemd[1]: dovecot.service: Failed with result 'exit-code'.
> Hint: Some lines were ellipsized, use -l to show in full.
> dpkg: error processing package dovecot-core (--configure):
> subprocess installed post-installation script returned error exit status 1
> (and more)
>
> Apologies for any wrapping due to long lines in the above output.
"Hint: Some lines were ellipsized, use -l to show in full."

Without seeing the full messages, my guess is that you've got problems 
with your IPv6
configuration or connectivity.  It's a long shot, but might save you a 
round-trip
on the mailing list.

Jeff