Help
Reply tracking
What it does
Keeps both sides of the ledger: who owes you a reply, and who you owe one to. When something's been sitting too long it drafts the chaser in your own writing style.
Try this
“Who hasn't got back to me?”
What it needs
Nothing. It works from your mailbox.
What it won't do
Chasers are drafted, never sent automatically. Nothing leaves your mailbox until you say so.