This?Using ISA to protect the SBS mail server just a smidge more....
Merv Porter [SBS-MVP]
From what I've read, this will only work if you are using Exchange defender... I was thinking more towards copying the same rule, place it just above the original, change to DENY and create a Network Domain Set where I would then include the "bad" IPs. This way I would not have those IPs connect to port 25 on the SBS Server.
I guess I will just keep on looking for a solution. I am surprised I could not set up a rule that does just that... it seems so obvious... but apparently it isn't so...
Dan, it's so simple that if you don't know how I ain't gonna provide step by step.
Create a network set containing IP's/subnets you wish to ban.
Stuff banning just SMTP from them (though you could just do that), create a rule that bans any traffic from those IP's.
It's a wiz for Pete's sake.