On 2018-05-30 16:44, Per Jessen wrote: > According to RFC1034 and 2181, a PTR record using a CNAME is not > permitted. I believe this to still be correct, postfix certainly > doesn't work with a CNAME when it does a reverse lookup.
Postfix certainly does as: $ dig +short 50.131.144.213.in-addr.arpa. ptr 50.63-28.131.144.213.in-addr.arpa. citadel.ch.unfix.org. would otherwise not work.... and that trick of CNAME'ing in-addr.arpa space is used a lot by ISPs to delegate space (as per the above example where init7 forwards them to my nameservers). There is also a nice RFC on that: https://www.ietf.org/rfc/rfc2317.txt Greets, Jeroen _______________________________________________ swinog mailing list swinog@lists.swinog.ch http://lists.swinog.ch/cgi-bin/mailman/listinfo/swinog
