Am 19.02.2018 um 13:12 schrieb Ralph Krämer: > I am sure this is mentioned somewhere in one of the RFCs - but I currently > have no time to look this up.
rfc1912 references in "CNAME records" section > Don't use CNAMEs in combination with RRs which point to other names > like MX, CNAME, PTR and NS. (PTR is an exception if you want to > implement classless in-addr delegation.) to rfc974, which sez in "Minor Special Issues" section > 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 I know of several big esp that reject if rcpt mx is resolved by a cname-rr Cheers tobi _______________________________________________ swinog mailing list swinog@lists.swinog.ch http://lists.swinog.ch/cgi-bin/mailman/listinfo/swinog
