receiveing mail

[maybethistime]

ok, i give up. i've been able to send mail for the past several days but can't receive. telnet to port 25 brings up a banner but no clue where mail ends up. also, i've had to recreate the certificate 3 times since the install (a week ago). suggestions on which logs to review? i've checked the var/log/zimbra.log and opt/log/zimbra.log. the var log indicated the issue with the cert but i can't see why mail doesn't hit the maibox.

[KevinH]

anything in the postfix queue (postqueue -p)? Can you tail/capture the logs when you send a message?

[maybethistime]

yes, 15 messages. the last 2 indicate the connection timed out.

[maybethistime]

i can't telnet to port 25 from the outside any loner. inside replies with banner...

[KevinH]

Have you made any IP address or firewall changes? Are the timeouts/IP addresses listed in the queue your internal or external IP address?

[maybethistime]

no changes to the firewall. port 25 is open. all addresses for queued mail point to the public address.

[KevinH]

Can you telnet to the public address port 25 when on that box? Ideally you should have DNS configued so that postfix and the like use the local/internal IP and not the public/external one. If you can't telnet to port 25 on the public IP and the messages are queued for that IP then there is a problem. Need to either have postfix use the intenal IP (DNS config) or fix your network so you can telnet to port 25 on the public IP.

[maybethistime]

hosts file has 2 entries:
127.0.0.1 localhost.localdomainlocalhost localhost
192.168.3.21 mail.real-timecomputingsolutions.com mail

pinging mail. internally resolves to 192.168.3.21

[KevinH]

What does "host `hostname`" return. Ping may use files, but host will do a DNS lookup and hostname will ensure that you can lookup your own hostname.

[maybethistime]

host "hostname" resolves to public ip. i'm setting up a host record in the internal dns and will modify settings. i'll let you know results.