Adding spam filters
Spam filters are settings that enable your mail server to block email that originates from the email addresses, domain names, or IP addresses you specify.
To add a spam filter for your site:
In the shortcuts area of the Home page, click Spam Filters (Email section). The Spam Filters form, showing the existing spam filters on the domain.
Click Add a Spam Filter. The Add Spam Filter form.
In the Email, Domain, or IP field, enter any of the following information to block email.
An email address
A domain name
An IP address
Click Add Spam Filter.
Go to quick-start guide: Set up your site's email services