yesterday I have installed ISPConfig on my Centos 4.5 server.
Everything is working fine, but only postfix has some problems.
When I send an e-mail to "firstname.lastname@example.org", I get the following error:
This is the Postfix program at host web1.
I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below.
For further assistance, please send mail to <postmaster>
If you do so, please include this problem report. You can delete your own text from the attached returned message.
The Postfix program
<email@example.com> (expanded from <firstname.lastname@example.org>): Host or domain
name not found. Name service error for name=web1.web1 type=A: Host not
I have try 2 e-mails, but I get the same error.
I have more domains, and I get this error in al my e-mails.
Sending e-mails via webmail is not a problem.
Only receiving is a problem
Anybody who can help me out