Arcbox
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Framework
Sentio
Email inbox API for AI agents — every agent gets its own real email address.
Day 43 since launch · Launched 25 August 2026
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What is Sentio?
Sentio is a complete multi-tenant mail server in Rust with an API built for AI agents: give every agent its own real email address, receive mail as structured webhooks and reply in-thread over REST, with DKIM/SPF/DMARC/ARC, MTA-STS, DANE and three-tier anti-spam.
Pros
- Full mail server in Rust
- Structured webhooks for inbound mail
- Serious deliverability: DKIM, SPF, DMARC, DANE
Cons
- Self-hosting email is operationally demanding
- Aimed at developers
Who should use Sentio
Developers building agents that need to send and receive real email.
Who may not need it
People who just need a normal email account.
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