No, Till, that was not the case. Please read carefully.
I installed using this tutorial, step 11: http://www.howtoforge.com/perfect-se...ispconfig-3-p4
11 Install Postfix With MySQL Support
The "normal" Postfix package from the CentOS repository doesn't have MySQL, but the Postfix package from the CentOS Plus repository does. Therefore we remove Postfix...
yum remove postfix
... and install it again, this time from the CentOS Plus repository:
yum install postfix
Then turn off Sendmail and start Postfix and MySQL:
chkconfig --levels 235 mysqld on
chkconfig --levels 235 sendmail off
chkconfig --levels 235 postfix on
After I finished installing ISPconfig3 I got this, as posted above:
My problem is this:
Sep 8 04:24:09 server1 postfix/master: warning: process /usr/libexec/postfix/qmgr pid 29671 exit status 1
Sep 8 04:24:09 server1 postfix/master: warning: /usr/libexec/postfix/qmgr: bad command startup -- throttling
Sep 8 04:24:53 server1 postfix/smtpd: fatal: unsupported dictionary type: mysql
Seems Postfix has no msql support?
Then I redid Step 11 in the tutorial, unistalled Postfix, reinstalled from Centos Plus repos, and I got the error, also posted above:
host mail.dtxigaming.com[188.8.131.52] said: 554 5.7.1
<firstname.lastname@example.org>: Relay access denied (in reply to RCPT TO command)
I guess I have to change the relayhost settings in /etc/postfix/main.cf
So I started searching for a solution on the Howto Forums and I found this one:
In which u advised user onastvar to to the following:
Instead of a reinstall, please try an update and select "y" when you get asked if services shall be reconfigured. If you would do a reinstall instead, all settings would get lost.
I did the same:
I also chose to reconfigure services. And this landed me straight back to square 1:
postfix/qmgr: fatal: unsupported dictionary type: mysql
I'm stuck in a loop.
So what am I suppose to do next? "Cause I'm really lost over here...