Valdis(_dot_)Kletnieks(_at_)vt(_dot_)edu wrote:
On Tue, 18 Mar 2003 14:18:19 EST, David Green said:
The vt.edu domain certainly only has a few authorized outgoing smtp
relays. I don't think they handle enough mail to justify a server farm
of 200 servers just for their email.
The question is whether AOL.COM has few enough authorized outbound relays
that it fits in a single 512-byte UDP DNS query. I know they can't fit
all their inbounds into one packet, so I suspect the outbounds don't either.
My tools show some providers with whole class C's virtually stuffed with
"official" mail servers. MSN/Hotmail is a good example - probably
considerably more than 250 outbound servers in total (once you include
all of the MSN/Hotmail mail servers plus all the webmail things that
send directly) in various class Cs.
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