On Thursday 11 November 2004 19:28, Tracy wrote: > At 19:22 11/11/2004, Jeffrey Laramie wrote: > >Hi All- > > > >The mail server belonging to a client of mine "mail.client.com" uses > > another server "relay.client.com" to relay outgoing mail. mail.client.com > > appears to be correctly configured but relay.client.com doesn't resolve. > > Mail from this domain is bounced when it fails the XMail RDNS check. I'm > > trying not to piss off a client, but it's my understanding that according > > to standards the relay must have an A or CNAME record. Is this correct? > > If so, could someone point me to the rfc that states this so I can gently > > point this out to the client? I've been looking in RFC2821 but I'm not > > finding what I'm looking for. > > RFC 2821, section 3.6 > > > 3.6 Domains > > Only resolvable, fully-qualified, domain names (FQDNs) are permitted > when domain names are used in SMTP. In other words, names that can > be resolved to MX RRs or A RRs (as discussed in section 5) are > permitted, as are CNAME RRs whose targets can be resolved, in turn, > to MX or A RRs. Local nicknames or unqualified names MUST NOT be > used. There are two exceptions to the rule requiring FQDNs: > > - The domain name given in the EHLO command MUST BE either a primary > host name (a domain name that resolves to an A RR) or, if the host > has no name, an address literal as described in section 4.1.1.1. > > - The reserved mailbox name "postmaster" may be used in a RCPT > command without domain qualification (see section 4.1.1.3) and > MUST be accepted if so used.
Ah, there it is. Thanks Tracy Jeff - 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]
