Mailflare

Mailflare runs webmail for your own domains from one Worker in your Cloudflare account. Mail and attachments stay in your D1 database and R2 bucket, whichever provider receives or sends them. The Community edition is free, and one-time licenses sold on mailflare.co add branding and team features.

Connecting a domain that already uses Cloudflare DNS turns on Email Routing and writes the DNS records. Each domain can instead receive or send through Resend or Amazon SES, chosen separately for each direction, with the provider's credentials added on the domain page. The mail client handles attachments, rich text, signatures, automatic replies, search, folders, stars, snooze, archive and spam. A calendar handles repeating events and emails invitations to attendees, and a public booking link lets anyone reserve free time on it. Routing rules store, forward, reject or sort incoming messages. Administrators manage API keys, webhooks, audit logs and scheduled database backups. Users can import and export mail, keep contacts and block senders. The optional assistant runs on Workers AI or an OpenAI-compatible provider. It searches mail, manages calendar events and prepares drafts that a person reviews before sending. External AI clients connect over MCP with separate permissions per key, and the homepage lists JMAP access for desktop and mobile mail apps. The Worker is built with vinext. Three Queues process inbound, outbound and assistant jobs, a Durable Object pushes real-time updates, and the Images binding handles image optimization. Two cron triggers run a daily backup and, every five minutes, assistant maintenance and trash retention. Mailflare also runs as a single Docker container on any server, with SQLite and local files in place of D1 and R2.

Built for: Founders, freelancers and small teams who want custom-domain email in their own Cloudflare account, with a one-time license for team features.

What you can use it for

• Run custom-domain mail for a side project without per-seat hosting
• Share hello@ and support@ inboxes across a team with a Team license
• Automate mail handling with routing rules, webhooks and the REST API
• Draft replies with an AI assistant and approve them before sending
• Let anyone book free time on your calendar through a public link

Deploy

• One-click · main path

  Branch main

  Deploy to Cloudflare

• CLI

  Branch main

  npm install
  npm run deploy
  npx wrangler secret put CF_TOKEN

  Copy

Create the scoped CF_TOKEN API token by hand, deploy with the button, run the /setup wizard, then connect a domain and choose whether Cloudflare, Resend or Amazon SES receives its mail.

What it needs to run

• D1 databasesmailflare
• Durable ObjectsRealtimeHub
• ImagesIMAGES
• Queues (consumer)mailflare-inbound
• Queues (producer)mailflare-inbound, mailflare-outbound
• R2 bucketsmailflare-raw
• Email sendingEMAIL

Good to know

Without an active Team license, the admin cannot create shared inboxes or manage other user accounts, and custom branding needs a Professional or Team license. New Amazon SES accounts start in a sandbox that delivers only to verified addresses. The Worker must keep the name mailflare. There are no tagged releases, and updates run through a GitHub Actions workflow that replaces the installation repository's tree with upstream.

Cost on Cloudflare

Where this comes from

• Repositoryhttps://github.com/hieunc229/mailflare
• App websitehttps://mailflare.co
• Documentationhttps://github.com/hieunc229/mailflare/blob/main/docs/deployment.md

An alternative to Fastmail, Forward Email, Gmail, Google Workspace, ImprovMX, Migadu, Outlook.com, Proton Mail, Titan Email, Tuta, Zoho Mail.