Had installed "iRedMail0.9.6" and didn't uninstall it (not sure how, only a complete refresh works). Now tried to install "citadel-suite" and got this error: package dovecot-core 1:2.2.22-1ubuntu2.4 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Crazyness]

package dovecot-core 1:2.2.22-1ubuntu2.4 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

I'm experimenting with installing a mailserver on ubuntu. Obviously, not having 100% success, but it is a very great learning experience.

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: dovecot-core 1:2.2.22-1ubuntu2.4
ProcVersionSignature: Ubuntu 4.4.0-75.96-generic 4.4.59
Uname: Linux 4.4.0-75-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
Date: Sun Apr 23 20:52:29 2017
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2015-10-25 (546 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.2
 apt 1.2.20
SourcePackage: dovecot
Title: package dovecot-core 1:2.2.22-1ubuntu2.4 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to xenial on 2017-01-31 (82 days ago)

[Joshua Powers (powersj)]

From journal errors log:

Apr 23 20:52:29 hostname dovecot[3985]: master: Fatal: service(pop3) access(/usr/lib/dovecot/pop3) failed: No such file or directory
Apr 23 20:52:29 hostname systemd[1]: Failed to start Dovecot IMAP/POP3 email server.
Apr 23 20:52:29 hostname systemd[1]: dovecot.service: Failed with result 'exit-code'.

[Joshua Powers (powersj)]

Thank you for taking the time to file a bug report.

From the log message above it looks like the pop3 file/directory is
missing. Can you verify it exists?

Since it seems likely to me that this is a local configuration problem,
rather than a bug in Ubuntu, I am marking this bug as 'Incomplete'.

However, if you believe that this is really a bug in Ubuntu, then we would
be grateful if you would provide a more complete description of the problem
with steps to reproduce, explain why you believe this is a bug in Ubuntu
rather than a problem specific to your system, and then change the bug
status back to "New".

For local configuration issues, you can find assistance here:
http://www.ubuntu.com/support/community

[Launchpad Janitor (janitor)]

[Expired for dovecot (Ubuntu) because there has been no activity for 60 days.]