On Sat, 14 Mar 2015, Paul Vixie wrote:

ultimately what matters is whatever works. if cloudflare decides to stop
answering QTYPE=ANY then it would take all million or so qmail customers
complaining to cloudflare's NOC to get cloudflare to change its mind. i
don't think that's going to happen, for a number of reasons, one of
which is that the corner case qmail is depending on was a bad idea
originally and has gotten nothing but worse since then. but let's run
the experiment, shall we?

I bet most qmail installs run from distributions that have included the
CNAME patch. I'm not sure if this is going to break more than 1 server.

All debian qmail packages come with:

http://ftp.de.debian.org/debian/pool/non-free/q/qmail/qmail_1.03-49.2.diff.gz

+  * Applied patch to dns.c to allow e-mail to deliver correctly to systems 
where
+    their DNS size is greater > 512.  Fixes "CNAME Lookup Failure" error when
+    delivering mail to aol.com
+
+ -- Jon Marler <jmar...@debian.org>  Sat,  29 May 1999 12:33:00 +0100

This ship sailed 16 years ago. The only people at risk are those who
compiled from source without applying patches.

Paul

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