How do I mass-delete unsubscribed contacts?

Hello @CoreanS ,

If you already have a CSV or other file with these 450+ contacts, I'd recommend the following steps:

1. Upload the 450+ you want removed, and make a new list as part of the upload process. Call it something obvious like "700 for Removal."
2. Once uploaded, go to that list and select-all the 450 or so contacts in it.
3. With all the contacts in the Removal list selected, click Actions > Delete > select the list you want them removed from.

If you know a common element to segment out these 450+ contacts, you can use the segmentation tool. Then add the segment to a list, select-all, and delete.