Blank recipient mail

mcmneko
mcmneko used Ask the Experts™
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I've been getting some complaints from two users claiming people are sending them emails but some never show up in their mailbox. When I go into message tracking and look up the sender, a portion of the emails have a blank sender field. As far as I know this is only for two incoming mail addresses. At first I thought the senders were simply misspelling the names of our users but apparently they don't get any NDRs on their end. Is there any reason why there isn't any recipient for a small number of incoming emails?
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Awarded 2009
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Commented:
So which part of the email is missing the sender or the recipient (your question indicates both)

These sorts of anomolies are normally down to SPAM/Virus software installed on the Exchange server, first thing to do is uninstall it, reboot and then try again to see if the problem persists.

If it works once removed, then re-install the software and see if the problem returns.

Author

Commented:
The recipient is missing. I'll do a scan today and see if it picks up anything.
Awarded 2009
Top Expert 2010

Commented:
I didn't mean to do a scan, I mean to uninstall the SPAM/AV software and see if the problem persists.

Issues like this can often be down to SPAM/AV software and they way they interface with Exchange.
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Author

Commented:
Oh, sorry. Yeah I'll give that a try.

Author

Commented:
The only form of AV/SPAM protection on the server is Windows Defender. I went ahead and turned real-time protection off, but besides that there's nothing else running atm. I'll report back in a day or two to see if we're still getting black recipient mails.

Author

Commented:
I think the Content Filtering might have been blocking some of these. So I'll just try adding the domains to the accepted list. Thanks very much for your help.

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