Mark Delany write:
> I would (...) just
> use the 250 responses from the remote SMTP servers.
>
> I wouldn't bother chasing down the MX and then probing it, from the
> perspective of Sendmail vs qmail vs the-rest, the queue-id responses
> are sufficiently distinct with a few pattern matches.
>
> The best server logs to look at are probably those that are running
> diverse-interest mailing lists. ISP logs - regardless of whether they
> are running qmail - are probably fine since we're not counting local
> deliveries.
Good idea. For fun, I decided to look at the logs from our server for
the last two weeks. The sample size comes to 3,016,454 messages
delived to 62,786 different SMTP servers around the world.
Out of these 62,786 remote SMTP servers, 16,658 are running sendmail (27%)
and 5098 are running qmail (8%).
(The server providing these logs belongs to an ISP and includes a good
mix of private, commercial, educational and government users. The remote
servers are mostly active servers at other ISP's, schools or businesses
I presume, few `idle workstations')
--
Gjermund Sorseth
