chabral wrote: >Tracy <[EMAIL PROTECTED]> wrote: > > >>Because RFC2822 specifies that A records for mail servers should not >>be CNAMEs...:) >> >> > > You mean, rcf 2821. > Here is an extract: >"Once an SMTP client lexically identifies a domain to which mail will > be delivered for processing (as described in sections 3.6 and 3.7), a > DNS lookup MUST be performed to resolve the domain name [22]. > [.....] > The lookup first attempts to locate an MX > record associated with the name. If a CNAME record is found instead, > the resulting name is processed as if it were the initial name. If > no MX records are found, but an A RR is found, the A RR is treated as > if it was associated with an implicit MX RR, with a preference of 0, > pointing to that host. If one or more MX RRs are found for a given > name, SMTP systems MUST NOT utilize any A RRs associated with that > name unless they are located using the MX RRs; the "implicit MX" rule > above applies only if there are no MX records present. If MX records > are present, but none of them are usable, this situation MUST be > reported as an error. " > > >
Would you by any chance have a link to this document? This is something I really need to keep up on. 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]
