https://issues.apache.org/SpamAssassin/show_bug.cgi?id=6083





--- Comment #4 from Theo Van Dinter <[email protected]>  2009-05-20 16:34:05 
PST ---
I don't recall all of the details at the moment, but I think the main concern I
had was that the length of the information in the mirby file would cause lots
of TCP DNS queries.  The plan was DNS for small/quick things and HTTP for
larger bits.

sure enough:

$ host -t txt mirrors.testtxt.khopesh.com
;; Truncated, retrying in TCP mode.
mirrors.testtxt.khopesh.com descriptive text
"http://daryl.dostech.ca/sa-update/sare/72_sare_redirect_post3.0.0.cf
weight=500"
mirrors.testtxt.khopesh.com descriptive text
"http://abcdefghijklmnopqrstuvwxyz.abcdefghijklmnopqrstuvwxyz.museum/abcdefghijklmnopqrstuvwxyz/abcdefghijklmnopqrstuvwxyz/this-is-a-ridiculously-long-sa-update-channel-name-with-tons-and-tons-of-text.cf
weight=99999999999999999"
[...]



(In reply to comment #3)
> Why does SA even use a mirrors file instead of direct TXT records?  Here's a
> live example with a dozen round-robin TXT entries, including the longest
> real-life mirror I could find plus a ridiculously long example URL.  Am I
> missing some piece of the RFC that prohibits this?  We're already delayed by
> the propagation time of the versions, so that doesn't affect anything...


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