Observed arrival · 2026-10-05

Mail Mantis: a hand-operated email placement dashboard

mailmantis.org Visit website

Editorial interest 76/100 Selection signal · not a rating of the site

An open-source, self-hosted dashboard for sending test emails to inboxes you own and checking where they land.

Landing page captured for the 2026-10-05 issue.

For: Operators checking email placement for domains they own
Worth noticing: Placement checks read mailbox labels without moving messages; automated checks run while the dashboard is open.

Field notes

The setup guide shows a Docker Compose launch with Postgres and a generated encryption key, and also describes a Vercel with Neon option. Users can approve or edit drafts before sending; the page says seed inboxes reply only when the user writes or approves a reply. It also cautions that authentication and real engagement matter more than any placement tool.

Observed signals

Read the marks

Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

⊠LoginAccess appeared gated

✦PrettyNotable craft visible

◎NicheUnusually specific use

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