With rules you can process specific emails, this will help you to not print spam or unwanted emails.
How to use rules?
Step 1: Edit the account 'Auto Print Order'
Click on 'next' to move to the panel 4:
Step 2: Set option to 'No, process only emails with these rules'
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 a logical operator OR, that's mean one the line value must match.
Generally, you enter the email address which sends your orders (for example: online-orders@MyWebShop.com).
The rule based on 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%, like this: