[Dovecot] PAM and user@domain login?

Is there a way with 2.2.6 to have the system do a PAM login for user when presented with login user@domain pass from the IMAP services?

I have a stupid android client that wants to use user@domain but doesn't have an option to pass just user.....

Thanks for any help.

-- Larry Rosenman http://www.lerctr.org/~ler Phone: +1 214-642-9640 (c) E-Mail: larryrtx@gmail.com US Mail: 108 Turvey Cove, Hutto, TX 78634-5688