thanks hans. I guess I should make my question a bit more specific.
A little while ago I changed the name of a one of my clients websites in ISP manager --> Sites --> www.sitename.com
All seemed to work ok (eg the new site name worked for apache), but email was being rejected.
If, under the old site i had the user name bob, then his email was firstname.lastname@example.org
. When I changed the domain name, I looked under the user tab, and ISPconfig changed everything to the newsite.com, ie. email@example.com
Postfix was rejecting email to firstname.lastname@example.org
though with message user not found, because apparently it still looked for email@example.com
So, if I change my domain name in managment --> server --> settings, will i still be able to receive email? I noticed that incoming email is first checked to see if the user exists(eg firstname.lastname@example.org
), then it delivers it using the domain name i specified in server --> settings (email@example.com).