Susan,
It just ticks me off because I know there are a lot of others who will be in this boat.
Indeed, there are. I have numerous small customers that have either a single static IP or a /29 block from {Pacific Bell | your ISP} and that occasionally are blocked because either the block is marked as residential or the reverse lookup contains the string "dsl". However, trying to be pragmatic, this is a situation that will eventually solve by itself: Since having {Pacific Bell | your ISP} do anything about it is not an option, when these customers are trying to email to {AOL | some ISP} and are blocked, they will try first to have if {AOL | some ISP} to whitelist the address; if it can't be done they will say "get an ISP that does not suck". There are two sides on this coin; one is that indeed this stinks, but the other one is that AOL receives several billion spams a day, so I can understand that they're trying to control the problem with the tools they have. Curious, have you tried to call AOL to get the IP of the customer whitelisted? Michel.