pam_lastlog and cyrus imap

[D G Teed]

My cyrus uses saslauthd, which uses pam.
Everything is working OK.

Wanted to use lastlog to be able to prune out unused accounts.

Have only this for session entry in /etc/pam.d/imap

session     required	  pam_lastlog.so silent

I login over imap, and nothing new appears from last command.

Am I doing this wrong, or does cyrus/saslauthd need
something to support lastlog?