Recently I have noticed alot of emails being sent from my email address to my email address. This is true for quite a bit of our employees and they are getting 5-10 a day a peice. I looked at the email headers and they are from different source IPs so it does not appear to be coming from one place or another.
My question is with out using a spam filtering firewall (I just removed the Barracuda because the company was too cheap to keep the eval unit), killing my routers/firewalls with continously adding access lists to block source mail servers, how can i prevent his from happening?
Also, what may have caused this to start happening?
Any help is appreciated, thanks!