Re: [exim] SMTP Banner delay of 2 mins 30 seconds

On 06/05/2009, Eric Cross <ecross@???> wrote:
> Hello,
>
> Our mailserver (non-Exim..it's Kerio 6.6.2) is experiencing a consistent and
> repeatable smtp banner delay when connecting to Exim 4.69 mail servers.
> When telnet'ing from our outbound MTA to port 25 on four different Exim 4.69
> domains/servers there is a delay of precisely 2 minutes and 30 seconds
> before I see the SMTP banner. When I telnet from a different IP address
> (same /24 network as the Kerio mail server) to the same four Exim servers, I
> receive no delay.
>
> I suspect there is some type of greylisting/antispam going on here, but the
> delay seems to be quite excessive. I have checked spamhaus to see if our
> server's IP is listed currently, but it is not.

My money is on timeout of rDNS, forward DNS (based on the rDNS), or
ident. Or some combination of those 3 things.

Peter
--
Peter Bowyer
Email: peter@???
Follow me on Twitter: twitter.com/peeebeee