Francesco, You are correct in that DNS does allow trailing dot, in fact when we use dns names without trailing dots, we are using relative dns names. This is why you configure a domain name in your resolv.conf or in windows' interface dns dialog.
I have no idea as to why the MTA RFC might not have a trailing dot as a legal hostname. It does seem strange, but I leave that to those more qualified. Personally I agree with you. Rob :-) _________________________________________________ Note To Self: Remember to put something witty here later... -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Francesco Vertova Sent: Thursday, 2 November 2006 8:51 PM To: xmail@xmailserver.org Subject: [xmail] Re: Local domain and trailing dot At 00.25 30/10/06, you wrote: >Ok, this comes from 2005 but I'm going through stuff to include in 1.23. >The trailing dot is not legal, according to section 4.1.2 of: > >http://www.faqs.org/rfcs/rfc2821.html > >Path = "<" [ A-d-l ":" ] Mailbox ">" >Mailbox = Local-part "@" Domain >Domain = (sub-domain 1*("." sub-domain)) / address-literal sub-domain = >Let-dig [Ldh-str] I'm not clear what "legal" means here. If I pass "anydomain.com." (with the trailing dot) to nslookup, it does resolve. That's why the mail loop occurs (the MX point to the XMail server, but the XMail server does not accept it and tries SMTP delivery to itself again and again). IMHO and/or AFAIK: - a mail loop should only result from broken server config, not a user's typo; - this issue is more (or as much) related to DNS than SMTP; - the trailing dot is a common convention for indicating that a domain is fully qualified (per RFC 1912, 3.2: "If you don't put a `.' at the end of an FQDN, it's not recognized as an FQDN.") - Xmail should either perform a syntax check for the trailing dot, and if found issue a 5xx error WITHOUT trying to deliver/resolve, or recognize that a domain is local IF DELIVERING/RESOLVING; Ciao, Francesco - 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] - 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]
