26 Jun
2019
26 Jun
'19
10:07 a.m.
On 6/25/19 8:50 PM, Warren Toomey wrote:
The greet pause seems longer than I'd choose, but I think it's less than
60 seconds. Any reasonable mail server should handle that. So that
shouldn't be an issue.
You need to
grok Sendmail's log format (and SMTP in general), but it means
that Minnie connected to my server, waited the requisite time for the greeting
banner, and then shat herself when she saw my ginormous banner and dropped the
connection without so much as a good-bye...
i.e.a multiline response to the HELO/EHLO which meets the RFC specs.
> That simple measure, along with the greeting pause and some simple RFC DNS
> checks, block a lot of the crap. I've just subscribed to the Postfix mailing list,
and I'll ask on there
if there is a configuration change I can make to allow my Postfix client
to deal properly with Dave's multiline HELO/EHLO response. And why it can't
at present.
I'd be surprised if Minnie had a problem with the multi-line greeting.
I think Postfix (if that's what Minnie is running) has been dealing with
multi-line greetings for a while. There's also the fact that—I
suspect—Minnie has been successfully delivering THUS to Dave's server
for a while. So unless Dave's multi-line greeting is new....
But if someone here already knows, could they let me
know?!
Do you have errors in your log?
Dave, Warren, feel free to reply to me (both of us) directly if you want
to discuss this further off list.
--
Grant. . . .
unix || die