Step 2: Add mailing status to the groups

To send a letter to the groups, you don't need a mailing status. You can send letters based on event, balance, way of payment etc. To prevent extra work, please check first if you do need mailing statuses.
You can check the filter options on this page.

There are 2 ways to add that mailing status to a group.

You can either do that via the group module -> mailings -> Assign group mailing status

Select the group(s) that need a certain status, click the 3 dots in the top of the table and choose the mailing status the selected group(s) need.

You can also do it via the group list. Edit the group and in the bottom of the screen you can change the mailing status.

Go to:

Step 3: Create group letters