simta/simta — pull request #1 by flowerysong (2013-07-30 19:24:12+00:00)
Title: denser: use 'in-addr.arpa' instead of 'IN-ADDR.ARPA'

Both are correct and nameservers *must* treat them identically,
but there's a widespread bug in Cisco firewalls that results in
broken reverse lookups when the request is uppercase.

Stupid Cisco.