Hi, This is my first experience with ISPConfig 3.1 on CentOS 7. My Setup is composed of several Web and DB Servers for multiple Sites, but all sites share the same domain. Some sites will be managed by different persons, so I used the client concept to link each person to the sites it will manage. We already have a mail server for our domain. Is it possible to send notification emails from ISPConfig using our external mail server without configuring the mail service in ISPconfig, or do I have to do it? And if I have to configure a mail server on the master ISPConfig, how can I tell it to just send then externally? Regards.