Re: Questions...

[Scott D. Yelich]

Is this offsubject?

>    Note that the algorithm to delete irrelevant RRs breaks if LOCAL has
>    a alias and the alias is listed in the MX records for REMOTE.  (E.g.
>    REMOTE has an MX of ALIAS, where ALIAS has a CNAME of LOCAL).  This
>    can be avoided if aliases are never used in the data section of MX
>    RRs.
> cf. http://www.faqs.org/rfcs/rfc974.html
> This is the only mention of the non-use of CNAMEs in the mail standards.


OLD A:

main.server     A       IP1
mail.server     CNAME   main.server
host1           A       IP2
                MX      mail.server
host2           A       IP3
                MX      mail.server

NEW B:

main.server     A       IP1
mail.server     A       IP1
host1           A       IP2
                MX      mail.server
host2           A       IP3
                MX      mail.server

For what it's worth, it seems to me that moving from the old style A to
the new style B ... is so trivial, it shouldn't be an issue or a hassle.

Scott