On Mon, 26 Apr 2010, Phil Mayers wrote:
>
> FWIW we've decided to test this by adding a large TXT to the apex of our
> zone, pointing qmail users to a description of the problem. This seems
> easier to backout than a zone signing and will allow us to gauge the
> scope of the problem (frankly I'm inclined to not worry about it!)

It's a very rare problem. We've discovered about five broken qmail sites
since cam.ac.uk was signed. None of them have fought back at our
suggestion of adding a patch. (It's impossible to run qmail unpatched,
since it won't compile on modern Unix, and because it has no anti-spam
features so you also have to replace its smtpd.)

-- 
Tony Finch - Mail Support, University of Cambridge Computing Service
    <[log in to unmask]>   <http://www-uxsup.csx.cam.ac.uk/~fanf2/>