As I said in post #1 in this thread, I had left Amavisd and ClamAV uninstalled during my last reinstall because I thought it might have been one of them causing the problem. Since the problem is not Amavisd and ClamAV, I'm going to install them again. I'm also suspecting that my ISP is not letting me relay through there smtp server or there is not something configured on my server for that. Which is strange because more then week ago I had mail working and everything on centos 5.2 and ISPconfig 2 (which I did not have problems with). A few days ago I had got this in my inbox when I tried to send an email to an external account.
Your message did not reach some or all of the intended recipients.
Subject: test email server
Sent: 6/10/2009 2:40 AM
The following recipient(s) cannot be reached:
'email@example.com' on 6/10/2009 2:40 AM
554 5.7.1 <firstname.lastname@example.org>: Relay access denied
Would I use the email routing in ISPC3 to configure for my ISP's smtp server (smtp.charter.net)?