MailFlow
MailFlow sorts incoming email into IMAP folders and prepares reply drafts in the user’s writing style.
What MailFlow is
MailFlow sorts incoming email into IMAP folders and prepares reply drafts in the user’s writing style. It uses internal or client domains, threads, and keywords to classify messages, with an LLM fallback. Drafts go to the IMAP Drafts folder; MailFlow does not send them automatically. Mailboxes connect through generic IMAP or OAuth2 for Gmail and Microsoft 365. Listed LLM options include Ollama, OpenAI, Anthropic, Gemini, vLLM, LM Studio, and OpenAI-compatible endpoints. MailFlow is available as a web, API, and worker stack, and can be self-hosted with Docker Compose. The project recommends local Ollama for privacy and lists English and Spanish support. Its security file says a Fernet SECRET_KEY encrypts stored IMAP passwords and LLM API keys, and warns against reusing an early development key that appeared in Git history. Managed Free accounts are limited to one mailbox and 100 emails per day; self-hosted instances have no plan limits. The Free plan is free, and Paid is $12 a month.
Good
- Drafts replies in the user's writing style
- Connects through IMAP or Gmail and Microsoft 365 OAuth2
- Supports several listed LLM options
- Self-hosted instances have no plan limits
Watch out
- Managed Free is limited to one mailbox
- Managed Free is limited to 100 emails per day
- Does not send email automatically
- Early development SECRET_KEY appeared in Git history
Who it suits
MailFlow suits people who want to sort incoming mail and prepare replies for review rather than send them automatically. Self-hosting and local Ollama may suit users prioritizing privacy.
Verdict
MailFlow combines inbox classification with reply drafting while leaving sending to the user. Check the managed Free limits and follow the security warning when deploying it.
Plans and prices
From MailFlow's own pricing page, checked 9 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Free | Free | 1 mailbox · 100 emails/day · Free |
| Paid | $12 a month | Plan limits not stated · $12/mo |
The facts
Each one read from MailFlow's own pages, with the date it was checked.
What it does
- Classification
- It classifies mail using internal or client domains, threads, and keywords, with an LLM fallback.checked 9 Oct 2026
- Credential security
- The SECURITY file says a Fernet SECRET_KEY encrypts stored IMAP passwords and LLM API keys.checked 9 Oct 2026
- Drafts
- Generated replies are saved to the IMAP Drafts folder and MailFlow never sends email automatically.checked 9 Oct 2026
- Email integrations
- Mailboxes can connect through generic IMAP or OAuth2 for Gmail and Microsoft 365.checked 9 Oct 2026
- Language
- The README lists English and Spanish bilingual support.checked 9 Oct 2026
- Limits
- In managed multi-tenant mode, the listed Free plan limit is 1 mailbox and 100 emails per day; self-hosted instances have no plan limits.checked 9 Oct 2026
- LLM integrations
- The project lists Ollama, OpenAI, Anthropic, Gemini, vLLM, LM Studio, and OpenAI-compatible endpoints as supported LLM options.checked 9 Oct 2026
- Privacy
- The project recommends local Ollama for privacy and supports self-hosting.checked 9 Oct 2026
- Purpose
- MailFlow classifies incoming email into IMAP folders and generates draft replies in the user's writing style.checked 9 Oct 2026
- Roadmap
- Template library, correction-based learning, writing-style capture, and semantic search are listed as not yet implemented roadmap items.checked 9 Oct 2026
- Security notice
- The security file warns that an early development SECRET_KEY appeared in Git history and should not be reused for deployments.checked 9 Oct 2026
- Self-hosting
- MailFlow can be run as a full web, API, and worker stack using Docker Compose.checked 9 Oct 2026
The company
- Headquarters
- Coves de Vinromà, Castellón, Spainchecked 28 Sep 2026
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