On Tue, 17 May 2005, Matt Fretwell wrote: > [EMAIL PROTECTED] wrote: > > > IMO, a sending MTA should never have its smtp port closed unless > > it is an end-user. > > Once again, a sending server does not have to be a MX. Something within > that domain should be listening on port 25, but not always the machine > which is connecting to yours. Look at the hostname of my machine in the > headers. You will see it has rDNS and fDNS, but is not a MX for the > domain.
True, but it could helo with its hostname and then it would match connecting back to check its 220 string. Even if its a sending server, it should listen on 25 to verify that it is a mail server, even if it doesn't accept mail. If it doesn't listen on 25 (or isn't accessable) then it is a client and should be using some type of smtp-auth with the server to relay through it, or to one of its recipients. IMO, If you send a lot of mail, you should listen on port 25, even if you don't accept mail. _______________________________________________ http://lurker.clamav.net/list/clamav-users.html
