To blacklist multiple contacts that you import from a .csv file:

 1. Create a new list on the People page:

 2. Open the Import from CSV dialog window and follow the procedure.

 3. On the Review & Import step, select the list you have created:

4. Click Import. This action imports contacts from your .csv file to Reply.

 5. Open the list with the imported contacts.

 6. Select all contacts in the list:

 7. In the More drop-down menu, click Blacklist:

8. In the popup window, click Blacklist xxx contacts: