The rules are easy to use, it will filter your messages to process only the specific ones, particularly useful when your mailbox receives many types of emails (not only faxes).
The rule based on sender email address:
Enter per line one email address (firstname.lastname@example.org) or part of the address (@domain or myemail@ or any string part), each line is like logical operator OR.
Generally, you enter the email address of your online fax provider which sends the faxes.
The rule based subject keywords or email body data:
Enter per line one keyword or phrase, each line is like logical operator OR.
If you absolutely need to match specific keywords you can use the logical operator %AND%.