> > My incoming servers know literally nothing about which users have valid > addresses and which do not. All these servers do is accept or reject > inbound mail based on a (long) list of SMTP-level rules and forward the > messages that are accepted to another machine for SA and virus scanning. > > If sender verification requires that the incoming server have a complete > list of valid mailboxes, it's going to fail miserably here. I don't see > anything in the RFCs that makes my configuration non-compliant, do you? > > >
Maybe you have it backwards??? IMPO the mail server should know exactly what email addresses there are so that it can reject at the smtp level email that is not addressed to a real user or real live mailbox. Ie valid rcpt to :-) Some will disagree as they want every email whether addressed properly or not as some people that want to buy things are stupid and cant type or follow direction properly.... so they don't filter on invalid rcpt to. - rh -- Robert - Abba Communications Computer & Internet Services (509) 624-7159 - www.abbacomm.net
