Here is the situation. I have exchange 2003, gfi mail essentials 10.0 and a new dedicated web server using Plesk 7.
I have mapped the dns to point the mx pref 10 to my exchange server (lets say 188.8.131.52) I then set up another mx record pref 25 to point to the webserver (10.10.10.10). I also set up a catch all mailbox on the webserver (pref 25).
The idea is, if my local broadband goes down and exchange loses communication, pref 25 (offsite webserver 10.10.10.10)will become the primary mx and collect all mail to my domain. Then, the pop connector that comes with gfi can either use dial up and pop the webserver catch all address or pop it once the broadband is back online and download the mail in to exchange at which point it will be processed for spam, etc and placed for pickup.
I have double checked the mx records and all appears to be ok but somehow mx25 seems to be catching all of the mis-addressed mail. For example email@example.com where xyz does not exist. I suppose it could be catching other mail too but I dont know for sure. It sure looks like its all spam to me.
So, any ideas what I am doing wrong? It has to be something I'm not doing properly but I'll be damned if I can find it.
Any help or advice would be greatly appreciated. Thanks in advance.