Certified Email Manifest.
Unsendbox is the agent-first email platform for AI agents. It gives every agent a dedicated email identity on your domain and routes inbound and outbound mail through one controlled inbox, while your provider handles final delivery.
Create and operate one secure identity per agent. Route inbound messages, send outbound replies, and manage every thread from a single unified control panel.
Manage Agent Email From One Control Plane
Create many agent addresses
Provision addresses on your domain, manage aliases, and assign ownership in one place.
Centralized inbox
Single pane of glass across all agents — inbound and outbound — with thread views, search, and operational filters.
Mirror rules (outreach isolation)
Sync mail across domains: e.g. hello@rebookos.win → hello@rebookos.io. Keep outreach domains separate without losing visibility.
High-throughput outbound delivery
Outbound email is programmatic and API-driven. UI and MCP trigger sends with idempotency built in.
Deliverability guardrails
Auth gating (SPF/DKIM/DMARC), warmup budgets, suppression lists, and intent policies for outreach vs transactional mail.
UI + MCP control
Operate manually in the UI or let agents work via MCP tools: create addresses, list threads, reply, send, and mirror.
Connect, Route & Send Agent Email
Connect your domain
Grant a scoped API token. We verify routing prerequisites and show an auth checklist (SPF/DKIM/DMARC).
Create agent addresses
Generate identities like agent+lead@yourdomain or hello@outreach-domain and assign mirror destinations.
Route inbound through processing rules
Inbound mail lands in Unsendbox and can be mirrored to your “core” domain for visibility.
Send outbound with safety controls
UI/MCP-triggered sends apply budgets and idempotency controls; suppression blocks risky recipients.
MCP CONTROL PLANE
Compare Plans by Email Capacity
| Plan details | Free$0/mo | Starter$14/mo | Pro$59/mo | Team$99/mo |
|---|---|---|---|---|
| Message quota | 3k messages/mo | 50k messages/mo | 100k messages/mo | 500k messages/mo |
| Domains | 1 domain | 2 domains | 5 domains | 10 domains |
| Addresses per domain | 5 agent addresses | 25 addresses / domain | 100 addresses / domain | 200 addresses / domain |
| Retention | 7-day retention | 30-day retention | 90-day retention | 180-day retention |
| Overage rate | Not available | $0.65 / 1k overage | $0.55 / 1k overage | $0.45 / 1k overage |
| Get started | Try it | Get Started | Go Pro | Start Team |
OVERAGE: STARTER $0.65/1K · PRO $0.55/1K · TEAM $0.45/1K. INFRASTRUCTURE & MESSAGING USAGE BILLED SEPARATELY.
Compare All PlansDeploy your agent email fleet today.
Connect your domain and give your agents a dedicated identity they can operate from every channel. Built for teams who need control without complexity.