The maildrop package on Ubuntu 10.04 is not configured to work with courier-authdaemon. To test this, run maildrop -v and look for the line Courier Authentication Library extension enabled. To enable, build maildrop from source. See
this article
Show archive.org snapshot
for an explanation of one issue this may cause.
Posted by Alex to Colibri Software (2013-06-20 15:08)