I see that I have a hung email floating in my outbound queue, probably because my mail server can't be reverse resolved (if I'm interpreting the error message correctly). Just FYI to everyone out there on the list who might be doing the same thing: you may be losing a lot of legitimate email. I know it's "correct" to have a proper mapping in the reverse zone, but there are an awful lot of people like me out there, running their private email servers on a always-on link (mine's DSL) to which we don't own the IP address. Therefore we CAN'T be reverse resolved. Ever. I called my ISP about this awhile back, and he told me he wouldn't let me be the authority for my IP address, even though I run a forward zone for my domain name, because it'd be too much hassle for him to let everyone do it. Furthermore, he -- as the head tech of a large national ISP -- implored me NOT to put this spam prevention method into place on my own email server because -- according to him -- well over HALF the email servers on the internet are in a similar situation. Don't get me wrong; I don't mind people throwing my mail away. That's not my point. My point is that I just want everyone to be aware that you might be throwing away a lot more than you think. To Tom: I'm curious. Are you checking your logs? Are you tossing a lot of mail based on this rule? If so, is it early in the chain of events, or later? If later, and you're still tossing a lot from this rule, that might be indicative that my source was correct. I have no way of knowing if he is, but being as he runs many very large email servers, I gave him the benefit of the doubt. I've seen some stuff about spam on another list I subscribe to, and it leads me to think he is. Regards, dk