Still here with problems. I could not find the /etc/main.cf file on my linux fedora tree. But I manage to change the names as you suggested and now, when someone trys to get some of my emails account, this is the message they always get:
<firstname.lastname@example.org> (expanded from <email@example.com>): host
smtp.secureserver.net[188.8.131.52] said: 553 sorry, relaying denied from
your location [184.108.40.206] (#5.7.1) (in reply to RCPT TO command)
Reporting-MTA: dns; fycserver.com
X-Postfix-Sender: rfc822; firstname.lastname@example.org
Arrival-Date: Fri, 26 Oct 2007 16:17:27 -0500 (COT)
Final-Recipient: rfc822; email@example.com
Remote-MTA: dns; smtp.secureserver.net
Diagnostic-Code: smtp; 553 sorry, relaying denied from your location
I followed the instructions given By Falko in his "creating your own DNS with ISPConfig and Godaddy", and for one year as I told you once...everything worked perfect, so that's why the following support by godaddy staff pushed me to call them:
Support Staff Response
Dear Fernando Yepes,
Thank you for contacting Online Support. Please ensure that port 25 is open on any software or hardware firewalls you may be running. Should this be the case, your Internet Service Provider (ISP) may be practicing "anti-relaying", which is when an ISP prohibits the use of third-party SMTP (outgoing mail) servers on their network. Please contact your ISP to determine if this is the case. If so, you should be able to simply use their SMTP server with your domain E-Mail account. They'll be able to provide the appropriate settings for this.
Please let us know if we can assist you in any other way.
Does the DMZ produces all this problems with ISPConfig, I feel more confident of ISPconfig than in my knowledge.
Thank you very much.