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regsamp

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User is getting undeliverable email messages

One particular user is getting undeliverable email messages in their 2010 Outlook to senders that do not seem real that they never sent. It is intermittent and no other user seems to have this issue.

The user also can send and receive email without any apparent issue. We have scanned the computer with Kaspersky Anti-virus and Malwarebytes but we are not finding anything.

Any assistance offered would be greatly appreciated.
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Camy
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Sounds like the user is getting delivery failures for junk mail sent from outside of the organisation using their email address. There is not much you can do to prevent it other than possibly creating / using an SPF record mitigate the issue.
Presumably the failures will be things like "no such email address"?

http://en.wikipedia.org/wiki/Sender_Policy_Framework
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regsamp

ASKER

We do currently have an SPF record setup.
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Camy
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Okay. I was not sure if there is anything else we can do but thank you Camy.
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The email are coming back from multiple sources and none of the sources seem real. The user does not know any of the addresses. Below is an example:
redacted@yahoo.com; redacted@gmail.com redacted@sbcglobal.net; redacted@aol.com; redacted@yahoo.fr redacted@naver.com; redacted@cox.net; redacted@hotmail.com redacted@aol.com; redacted@hotmail.com redacted@hotmail.com; redacted@home.com; redacted@uboot.com redacted@camre.ac.uk; redacted@yahoo.com
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ASKER

This is another example:
alex003@uboot.com

mx.google.com gave this error:
The email account that you tried to reach is over quota. Please direct the recipient to http://support.google.com/mail/bin/answer.py?answer=6558 z27si30482380yhh.109 - gsmtp

The recipient's mailbox is full and can't accept messages now. Please try resending this message later, or contact the recipient directly.
Hi regsamp, given your example addresses it's most certainly spam with spoofed addresses.
The uboot.com email address has obviously been filled with spam and is not accepting any more mail.
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Is there anyway at all to help fix this?
Yeah the only way to "fix" is to set a rule to delete them as they arrive.?