Yes, EmailBison does support permanent lead deletion. While possible, you do have unlimited contact storage, and there are flexible ways to update your contact data when needed so there’s no need to delete them.
If you need to refresh or correct lead information, you can simply re-import your lead list:
Prepare your updated lead file
Upload it to your workspace and give it a new name
Complete the upload process
EmailBison will automatically overwrite all custom variables or add non-existing ones depending on the upload option (skip, update, or replace) with the new data for any existing leads. If those leads are part of active campaigns, they’ll also be updated accordingly.