Posto groups your inbox by who sent it, then lets you clear a sender's entire pile in one click. Built for small businesses running support@, admin@ and hello@ — without paying for another seat.
30-day trial · no card up front · your mail never touches our servers
Most inboxes are a flat list where one noisy sender buries forty real ones. By Sender collapses everyone into a single row each — click a name and their whole pile opens in a workbench beside it.
Twelve rows instead of a thousand messages. The person emailing about a real order stops being invisible.
"11 shown · 247 in your inboxes." Posto asks your provider how many that sender has actually sent you — not how many happen to be loaded.
Right-click a sender: archive all, mark read, flag, or delete all. You confirm the real count first, and deletes go to Trash — never straight to gone.
Most signature tools output something that looks great in the builder and falls apart the moment it lands in Outlook. Ours is built on tables and inline styles only — plain underneath, bulletproof everywhere.
Free, no login, works in your browser. Fill in your details, pick a layout, copy it into any mail client.
Fill your details in once and Posto builds a correct signature for every mailbox you answer — support@ signs as Support, admin@ signs as Accounts, you sign as you. Change the From field and the signature follows. Stored as data, not frozen HTML, so it's rebuilt fresh on every send.
Click a mailbox to preview its signature. Outlook-safe output — tables and inline styles only.
Windows 10 or 11 · about 90 MB
Posto is built by a small shop in New York that runs its own shared inboxes on it every day. Write to us and a person answers.