Philip Hazel wrote: > On Tue, 17 Oct 2006, Rene Marticke wrote: > > >>let me explain two scene why this callouts are abuse. >> >>1. >>[EMAIL PROTECTED] send mail to [EMAIL PROTECTED] >>--> domB callout whith [EMAIL PROTECTED] if [EMAIL PROTECTED] is valid. >>--> domA use callout to -> so call domB if [EMAIL PROTECTED] is a valid >>user .... loop > > > That is precisely why Exim does *not* do a callout with [EMAIL PROTECTED] > to verify a sender. It does the callout with "<>" as the sender. We've > had this discussion several times. There are some options for varying > the callout sender for recipient verifications (when one is generally > talking to another of your own MTAs), but not for sender verifications. >
ACK. Exim is polite and 'careful'. Most other 'major' MTA are as well. - But even if all were such, spammers/zombies have poisoned the well, making mailadmins ever more paranoid. Chances of blacklisting aside, fewer and fewer servers give useful responses. A defensive 'delay' vs typical callout timeout alone means I may even defeat such checks between my *own* servers! Else need more patience than is warranted for the already dodgy results... Never-ending battle, it is. :-( Bill -- ## List details at http://www.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://www.exim.org/eximwiki/
