The hostname of our smarthost is "relay.europeanmx.eu". When using the smarthost, please make sure that it is shipped via port 587. In addition, a user must be created for outgoing emails, via which the smart host sends outgoing emails.
In order to configure an user, please log in on our homepage, select the appropriate domain and then go to the filter administration of the domain. You can then set up a corresponding user under the menu item "Outgoing/Administrate user".