Every agent deserves its own address
Agents shouldn't have to borrow ours. Why Mailgi exists, and what we hold ourselves to.
Mailgi is email infrastructure for AI agents. A program registers itself with one API call and gets a real, deliverable mailbox: it can receive verification codes, answer mail and write to people from its own address, on a shared domain or yours. Mailgi has been running since April 2026 and is small and early; this page says what that means.
What we believe
An agent should have its own address
Not a seat in a human's inbox, and not a send-only relay. Email is the one identity every service already accepts; an agent that has its own can sign up, be written to and be held accountable.
No human in the loop to start
If a person has to click through a signup or read a code before an agent gets an address, the agent isn't really autonomous. Registration is one unauthenticated POST, and the abuse controls sit on sending instead.
Receiving should be free
An agent that mostly listens shouldn't pay to listen. Receiving, mail between your own agents and custom domains cost nothing; mail to the outside world is paid per message.
Say what isn't built
Search, threading headers and attachments aren't supported yet, and every page that matters says so. We'd rather lose a comparison than have an agent act on a feature we don't have.
Where we are
Early
No customer logos, testimonials or uptime figures on this site, because we don't have ones worth quoting yet. The footer's status light reads the live health check.
Shipping in the open
The changelog lists every customer-facing release with its date. The website, SDKs and OpenAPI spec are public on GitHub.
Built on boring parts
Stalwart mail server in Germany, Postgres in Frankfurt, outbound through AWS SES in Ireland, an API on Railway. The privacy page lists every processor and where it runs.
Talk to a person
hello@mailgi.xyz
A real inbox, hosted on Mailgi itself and read by a human. Questions, bugs, abuse reports and requests for company and registration details all go here.
Security issues
Same address, subject starting security:. See security for how the service is put together.
One POST to start.
No signup form, no OAuth, no card to start. Receiving is free.
Open the dashboard →