On 30.5.2012, at 20.25, Root Kev wrote: > mail_location = mbox:/var/empty:INBOX=/var/mail/%u
Note that it's not a good idea for different users to share a single directory for indexes, which is what this does. Preferably /var/empty wouldn't be even writable to the users so this wouldn't happen accidentally. You could instead use something like: mail_location = mbox:/var/empty:INBOX=/var/mail/%u:INDEX=/var/index/%u But if the clients always just download + delete everything, the index files shouldn't make any (positive) difference. > Had a chance to test this change this morning, and in my test environment, > this does drastically improve the ability to ssh and su during heavy pop3 > load (in test environment, change of 10-15sec to 1-2sec login). While this If you think the problem is authentication, try with passdb + userdb static (http://wiki2.dovecot.org/PasswordDatabase/Static) or passwd-file (http://wiki2.dovecot.org/AuthDatabase/PasswdFile) and see if you can reproduce the slowdowns with them.