[Dovecot] dovecot auth

[ben]

Hi,

I'm using dovecot with a passdb-file .

When I login using : test at testdomain.com I notice dovecot strips off the
domainname and looks up everything in front of the @ in his
passdb-file...

So I went on to configure the following in my dovecot.conf :

auth_username_format = %u@%d

restarted dovecot, but he still strips of the @ and the domainname ...

LOG (sorry for f* up format) :

dovecot: Feb 21 12:15:08 Info: auth(default): new auth connection:
pid=24483
dovecot: Feb 21 12:15:12 Info: auth(default): client in: AUTH	1	PLAIN
service=pop3	lip=195.207.136.102	rip=195.207.136.108	lport=110
rport=36132	resp=AGJlbkBpdHV4LmJlAHRlc3QxMjMu
dovecot: Feb 21 12:15:12 Info: auth(default):
passwd-file(test at testdomain.com@testdomain.com,195.207.136.108): lookup:
user=test file=/opt/dovecot/etc/dovecot.passwd
dovecot: Feb 21 12:15:12 Info: auth(default):
passwd-file(test at testdomain.com@testdomain.com,195.207.136.108): unknown
user
dovecot: Feb 21 12:15:14 Info: auth(default): client out: FAIL	1
user=test at testdomain.com


Can someone enlighten me on how to config it so he looks up
"test at testdomain.com" fully ?

thx