[jadmin] jabberd2 mailing list alive ?

[Tomasz Sterna]

Dnia 26-06-2007, wto o godzinie 16:11 -0400, Luis Zarrabeitia
napisał(a):
> My email provider refuses to enable fallback to de A record

It violates RFC 2821 section 5, which states:

5. Address Resolution and Mail Handling

   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
   names are expected to be fully-qualified domain names (FQDNs):
   mechanisms for inferring FQDNs from partial names or local aliases
   are outside of this specification and, due to a history of problems,
   are generally discouraged.  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. [...]

http://www.faqs.org/rfcs/rfc2821.html


And by this section Dreamhost refuses to set up MX records, because A is
sufficient.


-- 
Tomasz Sterna
Xiaoka Grp.  http://www.xiaoka.com/