Autodiscovery enables your users to easily set up Outlook and many other email clients and mobile devices¬†with just an email address and password. To enable autodiscovery, you must create an SRV record in your domain’s DNS with the following settings:

Service: _autodiscover
Protocol: _tcp
Priority: 0
Weight: 100
Port: 443
Target: autodiscover.greatmail.com

If your DNS requires editing the zone file directly, please contact Greatmail support for the proper syntax.