Lee Dilkie wrote: > > On 11/10/2010 6:32 AM, Michael Scheidell wrote: >> On 11/10/10 2:45 AM, Matus UHLAR - fantomas wrote: >>> On 10.11.10 08:23, Per Jessen wrote: >>>> I got the following reject this morning: >>>> >>>> <book...@example.com>: host mail.example.com[1.2.3.4] said: 550 >>>> Dynamic >>>> Style reverse DNS IP=[212.25.14.40].Rejected by MagicSpam >>>> 1.0.4-9.1 >>>> (http://www.magicspam.com/). >>> 40.14.25.212.in-addr.arpa. 3600 IN CNAME >>> 40.32-63.14.25.212.in-addr.arpa. >>> >>> well, the 40.32-63.14.25.212.in-addr.arpa is surely dynamic-looking >>> ;-) >>> >> as expected for classless DNS CIDR subdelegation, and valid according >> to rfrc's. magicspam didn't resolve the cname (either of them I >> suspect). >> not sure if I would use a cnam for quarantine.spamcheck.net. .. just >> put a second record in the zone file. > > This looks like RDNS delegation to me, allowing a statically assigned > block of addresses from an ISP to control their own RDNS lookups.
Yep, that is precisely what it is. /Per Jessen, Zürich
