Free tool
Is this address real, or a ghost?
Check one email address before it goes on your list. We ask the mailbox provider whether it will accept mail, and flag typos, disposable addresses and role inboxes like info@. Free, no signup, and we don’t keep the address you check.
Letterhead finds the ghosts already on your list.
Every Letterhead newsletter sorts its readers into engagement groups, including Ghosts: readers who have stopped opening and clicking. Each group shows how many readers it holds, so you can size it before you send.
The Letterhead Brief
You’re on the list.
The Brief lands once a week. Want these checks running on your own newsletter? Book a test drive →