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From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
To: Kelly Jones <kelly.terry.jones@gmail.com>
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Cc: freebsd-questions@freebsd.org
Subject: Re: Publishing information via DNS
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>
> % UDP, so no TCP overhead
>
> I know SPF uses this, and clamav publishes their current version
> number this way, but has anyone done this on a large scale basis?

no idea what "large scale" is, but it WILL work if done properly. on any 
scale.