Lately, I have been getting unknown emails from a sender called MAILER-DAEMON. The subject area is filled with non-sensible mixtures of letters and numbers. In fact, the other day, I was flooded with these. Each one was from MAILER-DAEMON. I simply deleted each one instead of opening any of them. While I am not for certain, I believe my system may already be vulnerable to some kind of malware attack.
In closing, any thoughts regarding the MAILER-DAEMON emails will be appreciated. Perhaps there are some tools I can run to explore this problem further.
On a sidenote, I am using AOL 9.0 SE for my email client. The operating system is XP Pro SP2 just in case this information is needed.