On 06/05/2009, Eric Cross <[email protected]> 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: [email protected] Follow me on Twitter: twitter.com/peeebeee -- ## List details at http://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
