Virtual Mailhosting System w/ Postfix Guide: Problem Solved

[mulebreath]

After trying endless hours to track down why my logins kept failing, I finally figured it out.

/etc/courier-imap/authmysqlrc

I had
MYSQL_SERVER localhost

When I changed it to
MYSQL_SERVER 127.0.0.1

(and restarted authdaemond), the whole thing came to life.

My nsswitch.conf and hosts file are in order, why would courier-imap not reference it?

Also (for fellow noobs), make sure to either set your email client's username to your full email address or change MYSQL_LOGIN_FIELD from
email to name.

Hope this helps someone else having similar problems.