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: mondoze.com) under Trusted domain.

Add sender email (eg: admin@mondoze.com) under Trusted Email Address.

5. Upon added, click on ok.