SW & Work SaS <info@???> (Di 19 Sep 2017 23:23:36 CEST):
> Hi all,
>
> I'm having a problem sending email to a particular network.
> We have Exim 4.87 and is working quite well without particular problem.
…
> and doing a check with mxtoolbox give a warning for the SMTP transaction
> time
> SMTP Transaction Time 15.297 seconds - Not good! on Transaction Time
>
> I can telnet the mail server and they have exim 4.89
> the answer time to telnet is about 19 seconds
>
> I'm rather sure that they have cPanel in place with the new tarpitting
> choice on
> Introduce a delay into the SMTP transaction for unknown hosts and messages
> detected as spam
>
> But, unfortunately, we have no connection with this network and a first
> request to them has been refused as we have no active services with them.
>
> I tried to put these set in the smtp transport of our exim conf
> connect_timeout = 10m
> command_timeout = 5m
> data_timeout = 5m
> final_timeout = 10m
> but they did not help.
What does your logs say about the connection attempts?
Do you have tcpdump traces, in case the logs are not meaningful?
Did you try sending via
<message.eml exim -d user@destination
?
Does it happen during recipient verification (in case you do that)
or does it happen during the delivery?
> Question, is there anything I can do (or try) to manage the long initial
> delay while connecting to this servers ?
> There should be something as verify-email.org manage to go on and do the
> recipient check.
I do not know what verify-email.org does. Maybe theyre known to the
particular servers meanwhile.
Best regards from Dresden/Germany
Viele Grüße aus Dresden
Heiko Schlittermann
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