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"Morphing" addresses in outbound emails?

Posted on 2014-01-13
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Last Modified: 2014-02-03
I have a client who insists he's sending some emails to valid email addresses and the emails are bouncing (generating NDRs). I've looked at the NDRs, and sure enough each, bounce has an email address that's misspelled by one or two characters. (Sometimes the misspelling is in the name, sometimes it's in the domain.)

My client insists that he's sending to valid addresses. I've inspected his Outlook Address book, and his Outlook DAT file (formally the NK2 file), and was able to locate about 1/2 the misspelled addresses in these three locations.

Is it possible that malware is bastardizing his outbound email addresses or is bastardizing his stored emails in his Outlook contact list, his Outlook Address book, or his Outlook DAT file? Or, is it simply a lot of user error (which is a real possibility with this user).
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Question by:jdana
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Korbus earned 280 total points
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I have never heard of malware that does that, nor can I see a reason for anyone to develop malware to do that.

Is the N2k file the one that hold the "suggestions" when you start to type in an address in outlook?   The way I remove those entries:  start typing, when the wrong address pops up, use the arrow keys to highlight it, then hit delete.  I would suspect some combo of user-error, and wrong addresses(past user-error) being cashed somewhere.
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by:jdana
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Thanks!
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