Hi Sam,
> What variables play into that? I use spamcop for RBL, > could it be that spamcop is slow in responding and that affects courier's response time?
Broken reverse DNS for the connecting IP address, and/or broken firewall that drops identd queries.
Even for localhost? Connecting to localhost port 25 exhibits the same behavior.
What commands should I use to check for broken DNS?
Take your list of nameservers from /etc/resolv.conf. For each listed nameserver:
dig @ipaddress -x 127.0.0.1
The result should be âlocalhost.localdomainâ, then:
dig @ipaddress localhost.localdomain a
To check for identd:
telnet localhost 113
If the connection is either established, or immediately rejected, you're OK. If telnet hangs, your local firewall configuration is broken.
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