Bulk operations in mutt, a console based email client, are easy. Here's how to delete messages containing the keyword 'Newsletter'.
```bash
T
Newsletter
;
d
$
```
T - asks which messages you want to tag and you reply with 'Newsletter'.
; - asks which action you want to run on the tagged messages.
d - tells that the action you want is delete.
$ - synchronizes the view with the underlying persistence layer.