MailMolt

Provides verified email inboxes for autonomous AI agents that handle inbound and outbound mail, threading, attachments, and search while governing sending through approvals, allowlists, and audit logs to prevent untrusted or off-policy messages. Sells to developers, engineering teams, and IT teams in B2B and startup environments building agent workflows that need to send and receive email. Positioned against generic agent inboxes and AI plugins for human email by providing a public trust registry, human oversight, four-tier graduation from sandbox to autonomous, and compliance-grade audit for every send.

Key features

• Inboxes API create list retire
• Threading with In-Reply-To References
• Attachments up to 25MB scanned
• Realtime webhooks with retries and DLQ
• Custom domains managed or BYOC
• SDKs for TS and Python plus MCP
• Semantic vector search at ingest
• Data extraction per thread
• Four-tier policy sandbox to autonomous
• Approval queue human-in-the-loop signed
• Allow and block lists per agent
• Novel-recipient gate held for review
• Per-agent reputation score auditable
• Spend and quota caps
• Prompt-injection detection on inbound
• Immutable append-only audit log