user is getting a lot of spam with the following content
"The following recipient(s) could not be reached:
XXXXXXXX@XXXX.XXXXXX.ru on 8/7/2008 5:32 AM
The e-mail system was unable to deliver the message, but did not report a specific reason. Check the address and try again. If it still fails, contact your system administrator.
< mail.XXXXX.ru #5.0.0>"
Is this just a flood of spam or could this be a legit problem. The user never sent an email to the address this email mentions.
Is there something that can or needs to be done besides eliminating this content with a rule?
(I X'd out the actual address it said because I didn't want to put the real address it says on the interent.)