At 08:37 PM 5/8/03 -0400, Yakov Shafranovich wrote:
From: "Ken Hirsch" <kenhirsch(_at_)myself(_dot_)com>
Does anybody have an idea of how many legitimate SMTP servers there are?
That is SMTP servers that are not used primarily for spam, have a static IP
address, and have been active in the last, say, 12 months.
These might be a starting point:
http://cr.yp.to/surveys.html
http://www.isc.org/ds/
From the first link, I see that on 2001-10-03,
D. J. Bernstein estimates over 4 million
(estimate made from a sample of 1 million random IPs)
42% ran some flavor of sendmail,
17% ran Microsoft Exchange or IIS.
17% ran qmail
(there were others, see the original survey)
His methodology looks good, I trust these numbers were reasonably
accurate in 2001-10-03. That was over 18 months ago,
a long time in internet years, but I think they probably haven't
changed all that much since then.
Scott Nelson <scott(_at_)spamwolf(_dot_)com>
_______________________________________________
Asrg mailing list
Asrg(_at_)ietf(_dot_)org
https://www1.ietf.org/mailman/listinfo/asrg