You can remove all/part of your contacts from Postmaster Express with the click of a few buttons so be careful!
Search for the group of contacts you want to remove from Postmaster Express by using the Quick Search or Advanced Search.
By doing this, you will return all the contacts you want to remove from Postmaster Express.
Remember, to perform a function on a contact/or group of contacts, you must first "search" for the contact/s. Then, once you have retrieved the group of contacts to the contacts form, you can perform the action on that group of contacts.
Your search will return all the contacts that matched your search criteria to the contacts form. Now, click on the "Spreadsheet View" button.
Now, once the new spreadsheet view form is up, (this is just a different view of the same contacts you returned using your search to the contacts form), click on the "Remove Contacts From Database" button.
That's it! Postmaster will will permanently remove the group of contacts from the database. THERE IS NO UNDO FEATURE.