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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.
anything in the postfix queue (postqueue -p)? Can you tail/capture the logs when you send a message?
yes, 15 messages. the last 2 indicate the connection timed out.
i can't telnet to port 25 from the outside any loner. inside replies with banner...
Have you made any IP address or firewall changes? Are the timeouts/IP addresses listed in the queue your internal or external IP address?
no changes to the firewall. port 25 is open. all addresses for queued mail point to the public address.
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.
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
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.
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.