Skip to content
ServerlessInbox Logo ServerlessInbox Logo ServerlessInbox Docs

ServerlessInbox Documentation

A complete JMAP email server that runs serverless in your own AWS account. Modelled at under $1 a month, and about 15 minutes from an empty stack to your first email.
Install with CloudFormation All deployment options Issues & Discussions on GitHub

What ServerlessInbox is

Section titled “What ServerlessInbox is”

One CloudFormation stack in your own AWS account gives you a working mail server: the JMAP API (RFC 8620 / 8621), webmail, an admin UI, an admin API and a blob API, generated DNS records, SES bounce and complaint handling, multiple domains, aliases, shared mailboxes, groups, plus-addressing, full-text search and push.

Nothing runs when nobody is mailing. Lambda, DynamoDB, SQS and SES do the work, so for a small company the modelled AWS bill is about $0.77 a month, and an idle deployment costs the price of its Route 53 hosted zone — roughly $0.50. Those are calculated figures with the workload and unit prices shown, not measurements from a production fleet.

ServerlessInbox is in public beta: expect rough edges and breaking changes between releases. The README roadmap lists what is not built yet, import and export first.

Documentation sections

Section titled “Documentation sections”
Tutorials Step-by-step guides for deploying and setting up ServerlessInbox for the first time.
How-To Guides Task-focused solutions for common administration, operations, and user tasks.
Reference API endpoints, environment variables, error codes, and other factual look-up material.
Explanation Architecture deep-dives, design decisions, and conceptual understanding of the system.

Common starting points

Section titled “Common starting points”