# dpkg -i /var/cache/apt/archives/psa-courier-imap_3.0.8-debian3.1.build82070706.15_i386.deb
(Reading database ... 58767 files and directories currently installed.)
Unpacking psa-courier-imap (from .../psa-courier-imap_3.0.8-debian3.1.build82070706.15_i386.deb) ...
dpkg: error processing /var/cache/apt/archives/psa-courier-imap_3.0.8-debian3.1.build82070706.15_i386.deb (--install):
 trying to overwrite `/usr/share/man/man1/courierlogger.1.gz', which is also in package courier-authlib
dpkg-deb: subprocess paste killed by signal (Broken pipe)
Errors were encountered while processing:
 /var/cache/apt/archives/psa-courier-imap_3.0.8-debian3.1.build82070706.15_i386.deb