550 5.7.1 Message rejected due to content restrictions hatası

bir arkadaşımın sorunu var yardımcı olur musunuz ? exc 2007 ve symantec 7.0 kullanıyor . sadece bir firma mail atamıyor.

content filterları disable etmişler ama sorun çözülmemiş.

Delivery to the following recipient failed permanently:

     [email protected]

Technical
details of permanent failure:
Google tried to deliver your message, but it
was rejected by the server for the recipient domain xxxhttp://platinoutsourcing.com /" target="_blank" href="void(0);">.com by http://mail.platinoutsourcing.com /" target="_blank" href="http://mail.platinoutsourcing.com/">mail.xxx.com. [x.x..x.1].

The error
that the other server returned was:
550 5.7.1 Message rejected due to content
restrictions

----- Original message -----

DKIM-Signature: v=1;
a=rsa-sha256; c=relaxed/relaxed;
        d=http://gmail.com /" target="_blank" href="http://gmail.com/">gmail.com; s=20120113;
       
h=mime-version:date:message-id:subject:from:to:content-type;