Cyrus-imapd virtual domains

[Sleepy Chanterelle]

Good day,
i am using cyrus sasl 2.2.6 with postfix , mysql, pam-mysql, cyrus sasl
I would like to ask you how is it possible to store the user's imap folder with the full email address like test at foobar.com and not just test. in my mysql db i have the usernames to be like that. i also set at imapd.conf the virtdomains: userid  Any ideas ?
thank you in advance

---
Cyrus Home Page: http://asg.web.cmu.edu/cyrus
Cyrus Wiki/FAQ: http://cyruswiki.andrew.cmu.edu
List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html