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Re: Re: DNS load research

2005-04-08 11:12:35
Radu Hociung wrote:
Leonard Mills wrote:

At about  Thu, 24 Mar 2005 16:01:16 -0500 (21:01 UTC)
Radu Hociung <radu(_at_)ohmi(_dot_)org> wrote:


The packet I used is (smaller than 60). Since your ISP fixed their SPF record, it generates much less DNS traffic:
ehlo u
mail from: <b(_at_)pobox(_dot_)com>
rcpt to: <radu(_at_)ohmi(_dot_)org>



I would strongly suspect that most professionally-managed MTAs
would kill that connection.  Not waiting for the server response
is rather strong spam sign. A hobbyist system might want to
accept that kind of connection.  ymmv.  With recent versions of
sendmail refer to documentation on Local_greet_pause and
FEATURE(`greet_pause')


You may be correct. There are also a lot of unprofessionally-managed MTAs, as well as older versions.

A standard-setup exim will indeed reject that (failure to adhere to
RFC-mandated SMTP synchronized conversation).

- Jeremy


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