This is the Postfix program at host bjapp4.163.net.
I'm sorry to have to inform you that the message returned
below could not be delivered to one or more destinations.
For further assistance, please contact <firstname.lastname@example.org>
If you do so, please include this problem report. You can
delete your own text from the message returned below.
The Postfix program
<email@example.com>: Message content rejected