I'm getting this error from time to time on certain messages coming in to my Exchange 2013 server. I've been searching but haven't been able to find any reference to this error message. It doesn't look like an Exchange error code, they're usually the three numbers but I've discussed it with the people who filter our mail for spam and it looks like the message is being successfully delivered to my server, only to disappear somewhere inside my system. I can send the message internally and send it outbound but when I try to send it inbound from an external source I get the same error. The message has a 17MB Excel file attachment but I've set the limits on my connectors a good bit higher than that. I've tried sending other files, even larger ones and they are transmitted OK. I know the message has been received by people on other mail servers OK.
Has anyone here seen this one?
Everything we hear is an opinion, not a fact. Everything we see is a perspective, not the truth.