Delete messages containing a keyword in mutt

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.