Please refer to below how to add Trusted Sender (Email or Domain) in Smartermail v16


1. Login to the web interface as administrator through URL : mail.yourdomainname.com and administrator user name with password.


2. Click Settings icon>  Domain Settings


3. Select Spam Filtering

Refer Red to add trusted domain, refer Yellow to add trusted sender.


4. 

Add in domain name (eg: exabytes.com) under Trusted domain. 

Add sender email (eg: [email protected]) under Trusted Email Address.


5. Upon added, click on ok.