Guys, my email server (Postfix) using Dovecott is able to send internal to internal and internal to external with no problem however anyone sending external email to my email server is never getting to the recepient for some reason. I am not sure what to check. I ran the "postsuper" and "postqueue -f" command to force the queues in case they are stuck but it does not appear to be that issue.

I have the firewall disabled on RHEL4 using the "system-config-securitylevel-tui" command and can't think what else could be the issue.

Anyone have any suggestions? I am really clueless right now.

Do you know if you are able to connect to port 25 from outside, or is you ISP blocking it?

Try sending an email from an external source (hotmail, etc), and have a look at what you maillog file says

Thanks but figured out is was SpamAssassin blocking all incoming (external) email. Disabled SA 3.1 and now mail is running smoothly with the occasional SPAM in it.