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To add a personal domain do the following:
- Go to the Administration tab
- Click Personal Emails on the left hand menu
- In the section under "Add New Personal Email" enter in the @ symbol followed by the domain name for the personal domain name you want to add
- Click the Add New Personal Email Settings > App Setup > Personal Domains
- Click the New button
To edit or delete a personal domain do the following:
- Go to the Administration tab
- Click Personal Emails on the left hand menu
- In the table under "Personal Emails" click to Settings > App Setup > Personal Domains
- Click Edit or Delete under the Actions column next to the respective domain
Blocking Form Submissions from Personal Email Domains
See the directions here for more information.