mail troubles after installing Maia

[Primo]

Thank you,

i did that and now im with 1 error less.

now i get this when im trying to send to the main domain:

#< #5.1.1 X-Postfix; unknown user: "info"> #SMTP

X-policyd-weight: using cached result; rate: -5.5
Received: from relay03.secure-mail.be (relay03.secure-mail.be [195.13.7.6])
by triplus.be (Postfix) with ESMTP id C0F9C1E0A228
for <info@triplus.be>; Wed, 22 Dec 2010 14:09:09 +0100 (CET)
Received: from unknown (HELO pexhub02.BGCCOMTOOLS.LOCAL) ([10.48.9.17])
by relay03.secure-mail.be with ESMTP; 22 Dec 2010 10:41:20 +0100
Received: from EXCMS02.BGCCOMTOOLS.LOCAL ([172.17.65.89]) by
pexhub02.BGCCOMTOOLS.LOCAL ([172.17.65.69]) with mapi; Wed, 22 Dec 2010
10:38:39 +0100
From: Filip Verbeeck <filip.v@aspbluesquare.com>
To: Triplus <info@triplus.be>
Date: Wed, 22 Dec 2010 10:41:13 +0100

and:

Dec 22 14:29:46 Debian-50-lenny-64-LAMP postfix/trivial-rewrite[24834]: warning: do not list domain triplus.be in BOTH mydestination and virtual_mailbox_domains
Dec 22 14:29:46 Debian-50-lenny-64-LAMP postfix/local[24835]: 99A8F1E0A228: to=<info@triplus.be>, relay=local, delay=0.6, delays=0.58/0.01/0/0.01, dsn=5.1.1, status=bounced (unknown user: "info")


i checked the main.cf and the line mydestination is not there so i can't change/delete it.