Due to an exchange of one of my servers I had to copy the domU with my ispconfig installation to another machine, which is located in another network. That means the domU also needs a new IP. I have changed (I hope) all of the instances of the old IP in the ispconfig db and in local configuration files. So far everything (bind, web, ftp, ssh, ...) works fine except for postfix. When I want to send an email to the copied domU (the old is still active), the mail is received but directly forwarded to the old domU instance. The nameserver entries point to the new IP and hostname, so that cannot be the issue.
Here an example for the address firstname.lastname@example.org
with example.org hosted on vsrv01.xyz.info:
to=<email@example.com>, orig_to=<firstname.lastname@example.org>, relay=vsrv03.xyz.info[88.198.149.xxx]:25
Which file/setting I would have to check/change to stop postfix using the old domU as relay? I really can't find any other instance of 'vsrv03' in any of the configuration files on 'vsrv01'.
Thanks in advance.