To add a sender or domain to your whitelist please do the following.

1. Log into your Ozhosting Control Panel
2. Click on "Manage" in the Mail Armour section
3. Click on "Domain Specific Settings" tab
4. Click on the "General Tab"
5. Click on "Antispam Controlpanel" link

This will take you into the Mail Armour Control Panel.

1. Click on "Sender Whitelist"
2. Click on "Add Sender"
3. Add the email address or domain you wish to whitelist and click "Add"