To create the rule:
- Log on to the Worry-Business Security console.
- On the Messaging Security Agent configuration, click Content Filtering.
- Click Add > Filter messages that match any condition defined > Next.
- Type a rule name and select the Subject checkbox.
- Click Next.
- Select Any specified keywords from the Match field.
- In the Enter keyword(s) field, type "REG. ^[\s]*$".
Do not include the quotation marks.
- Unselect the Match case-sensitive and Match-synonyms options.
- Click Next.
- Select the action to be taken on messages that match the new content filter rule.
- Under People to Notify section, configure the settings you prefer.
- Click Finish.
- Check the Enable content filtering option.
- Under the Enable section, check if the rules you want to be active have green icon. If the icon is red, click on it and it will turn green.