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Overview
RelayZap is self-hosted software that connects email mailboxes — Gmail, Zoho and generic IMAP accounts — to chat destinations such as Mattermost, Google Chat, or any webhook-compatible tool, so incoming mail lands in a chat channel instead of another inbox. It is built for teams whose visibility problem is structural: a dozen mailboxes don't scale, inbox-hopping is constant, mail gets caught late, and most tools charge per seat just to watch it. RelayZap is flat-priced, runs in Docker on your own infrastructure, and is currently in early access.
What it does
Multi-mailbox fan-in — unlimited Gmail, Zoho and IMAP accounts.
Posts into your chat — Mattermost, Google Chat, or any webhook.
Per-client routing — its own channel or pooled, your call.
No-loss delivery — cursors and dedup, so mail arrives once and always.
Attachments handled — uploaded, or summarised cleanly.
Multi-tenant — orgs, members and roles, kept isolated.
Encrypted at rest — envelope-encrypted, always.
Full visibility — status, counts and an event log.
Self-hosted — Docker, on your infrastructure.
Sources & destinations
Mail comes in from Gmail (OAuth), Zoho Mail or any IMAP server, and goes out to Mattermost natively, Google Chat by webhook, or any webhook-compatible endpoint. Microsoft Teams and Telegram are on the roadmap.
Built with
A hand-written static marketing site — no page framework — with a three.js WebGL hero, JSON-LD structured data (Organization, SoftwareApplication, FAQPage) and a small in-house runtime compiled from TypeScript with Bun.
"We built RelayZap because our own team was drowning in client inboxes. One channel fixed it."— iDefender IT Services · builders of RelayZap
Live site
RelayZap is in early access — self-hosted and flat-priced.
relayzap.comEmail-to-chat monitoringVisit ↗More of what we build and run: the iDefender network.