From: Colin Waring <colin@la...> - 2013-08-07 15:09:49
I have started seeing a lot of unrecognized commands being passed through to
the MTA (Exim) by ASSP.
The unrecognized command seems to be a part of the actual message and can be
plain text or encoded emails.
As a guide, I have 67 unrecognised commands in the MTA logs for today so
far. Yesterday had 59, the day before 72. Prior to that I had 3 and the only
thing that showed up in the logs as being unrecognized was "Accept: */*"
I can see a couple after upgrading to 13213 from 13210 and loads after
upgrading to 13217.
I didn't think too much of it at first but I am now informed that these
errors cause a 500 error and thus bounce the message.
Connections affect incoming and outgoing mail across a variety of source
platforms (Various versions of Exchange).
All the best,