Gustavo Galvan wrote: >Hi Davide, what do you think about to incorporate a new variable in server.tab >to check if sender email addrees exists ? >I'm rewrited a PHP script to do this (is attached) to probe and view the >process. > > > I think that this indeed should be integrated into the MTA.. The server should check and see if the domain exists and if it does, if the sender exists..
RFC 2505 thinks like me.. 2.9. Verify "MAIL From:" The MTA SHOULD be able to perform a simple "sanity check" of the "MAIL From:" domain and refuse to receive mail if that domain is nonexistent (i.e. does not resolve to having an MX or an A record). If the DNS error is temporary, TempFail, the MTA MUST return a 4xx Return Code (Temporary Error). If the DNS error is an Authoritative NXdomain (host/domain unknown) the MTA SHOULD still return a 4xx Return Code (since this may just be primary and secondary DNS not being in sync) but it MAY allow for an 5xx Return Code (as configured by the sysadmin). Personally, I'd like to be able to tell the server to reject (At SMTP level) all messages from non-existant domains, and I don't know about rejecting messages from addresses that don't exist... - To unsubscribe from this list: send the line "unsubscribe xmail" in the body of a message to [EMAIL PROTECTED] For general help: send the line "help" in the body of a message to [EMAIL PROTECTED]
