After upgrade of Ispconfig to Beta 3.1 Debian jessie I see: in my logs When I look @ this line it looks like an empty line. When removing the line and restarting postfix the error changes to Update: after adding # in front of the error is gone.
I think that was an error introduced in https://git.ispconfig.org/ispconfig/ispconfig3/commit/35a190769c20fa17b1c57bfae96107bd2c08e284 - the template file should have contained {myhostname} which would have been expanded to your actual hostname during installation. Eg. it would look like: Code: /^mail-1\.domain\.com$/ REJECT
