[Dovecot] any way to find last login time?

Hi,

For some reason I need to regularly check which mailboxes are in use and which are not. For POP3, I use my patched version of popa3d which updates mtime on ~/Maildir/cur/ every time user logs in, and I always have a reliable way to find active and inactive mailboxes.

Is there any way to find a last login time without parsing logs with dovecot?

-- Aleksey