Mail Forward Failure

Hi,

I forward all my emails (and do not leave copies) its been working pretty well, for a number of months. I've seen a couple that have not forwarded (but its been a long time) and I've gotten a small handful with "Mail Forward Failure" in the subject, but I could see who its from. Up until now they haven't been anything important, but the last one was from my credit card company which had fraud on the account so I would like to read it, is there any way I can get the message? It didn't forward it, but it did not appear to keep it either.