====== Using a different Mailserver (MX) ======
If you want to use a different mailserver for some domain(s) have a look at some threads in the forum linked below.
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Note: This also may help you if you get one of those errors:
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<code>postfix/virtual[19405]: E260688A63: to=<user@domain.tld>, relay=virtual, delay=0.27, delays=0.05/0.04/0/0.18, dsn=5.1.1, status=bounced (unknown user: "user@domain.tld")</code>

=== change it for all domains: ===
Here´s a howto for setting a different MX for all domains. It modifies the template of ISP-CP:
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[[http://www.isp-control.net/forum/thread-3661.html]]


=== change it for a single domain: ===
Have a look at this post. It describes how to take a domain out of the postfix configuration:
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[[http://www.isp-control.net/forum/thread-3247.html]]