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AI · September 1, 2026

inboxes.net

Open-source, multi-domain inbox and agent MCP for Resend

Visit inboxes.netAlternativestop 4% of September 2026

What it does

Resend gives you an API. inboxes gives you the inbox. Paste your API key, import your full email history, and get a real client for every domain - threads, search, undo send, scheduled send, snooze, rules, labels, and Gmail-style shortcuts. Tracking pixels and stripped by default. There's an MCP server, so your agent/harness of choice can read and draft your mail (sending is a permission toggle). $5/mo per org, unlimited members - or self-host free.

All your Resend emails in one place. Bring your own API key, import your full history, and get a real inbox for every domain.

Resend sends your email but has nowhere to read the replies. Paste your API key, import your history, and get threads, search, and scheduled send for every domain. Not a toy. A full-featured inbox built for teams that use Resend to send and receive email. Your Resend API key, your infrastructure. We never touch your DNS or sending reputation. Discord-style sidebar. Switch between domains instantly. Each one gets its own inbox. Import every sent and received email from Resend. Threaded automatically by headers and subject matching. New emails arrive instantly via webhooks. No refresh, no polling. Cross-tab sync keeps everything consistent. Invite teammates, assign roles (admin/member),…from inboxes.net

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