Rules can be used to give specific rights to a group of users.
Log in to your personal Mailinblack area and go to Access my admin area at the top right of your screen by clicking on your Surname and First name.
From your admin area, click the Settings menu on the left.
Click the Rules tab at the top of the page.
Here you visualise the already existing rules
To add a rule, click the Add Rule button and select the settings you want to apply by clicking on Add a setting.
After choosing the setting, click Next to assign it to a group.
If you want to add a group, follow this tutorial: https://faq.mailinblack.com/non-classe/comment-creer-un-groupe-dutilisateurs/
If not, you can click Select existing group to choose the group or groups you want.
After Saving, name the rule and save again.