Originally Posted by falko
The problem is that mydomain.nl is listed in /etc/postfix/local-host-names. Did you set the Co-Domain mydomain.nl to external mailserver as well in ISPConfig (go to Co-Domains, select mydomain.nl, and then go to the Options tab)?
Yes it is set to external mailserver. The ispconfig messages aren't coming in as well... These are sent to the same e-mail address.
What is the best option for this? Remove the entry in local-host-names?