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.