Message Processing field - why?

any idea what could be a reason for this:

BF8155AC0D6 1429 Thu Aug 12 13:17:07 mnagraba@grafika.com.pl
(host 127.0.0.1[127.0.0.1] said: 451 Message processing failed: Message forwarding interrupted)
studio@dmsystem.com.pl

and it is allways comming together with this:

Aug 13 16:23:47 avastrelay[12944]: info: closing smtp client ‘127.0.0.1:10026’
Aug 13 16:23:47 avastrelay[12944]: error: smtp client: connection timeouted ‘127.0.0.1:10026’

most of messages comes throught without any problems but I do not understand why I gat a timeout on some of them… ??

----------later-----------
now I know the answer…
i had line like that in my postfix.conf:

mynetworks=192.168.0.0/255.255.255.255, 127.0.0.0/255.255.255.0

after removing this line all mails to my company went smoothly through avastrelay without any timeout from postfix side.

Thanks for sharing… :slight_smile: