Features
SuperMailOS is hosted business email: we run the mail server, the sending IPs and the deliverability work. The parts other tools leave to you are simply included — on every plan, on every domain you connect.
DKIM on every message, SPF and DMARC from the server's own zone, a DMARC report dashboard, new-domain warm-up and sending-IP reputation watched day and night.
/features/deliverability
Domains & aliases→One-click DNS across six hosts (copy-paste anywhere else), records taken from the real server zone and verified live, and unlimited free aliases on every domain.
/features/domains
IMAP & SMTP→Standard IMAP and SMTP over SSL on every plan, with per-client app passwords, so Apple Mail, Outlook, Thunderbird and mobile just work. The webmail is optional.
/features/imap-smtp
Security→TOTP two-factor, session visibility and revocable app passwords for your mail apps, with Bcc privacy that holds. On every plan.
/features/security
API, webhooks & AI agents→A REST API, signed webhooks and an MCP server for Claude, ChatGPT, Claude Code, Codex and Cursor. Scoped keys you can revoke, sends that are safe to retry, and the same Bcc privacy as the inbox. On every plan.
/features/ai-agents
Free tools→Check any domain's SPF, DMARC, BIMI, blocklists and DNS, grade its email health from A to F, or look up a term in the plain-English glossary.
/tools
Want the head-to-head view instead?
See how SuperMailOS stacks up on the comparison pages, or read the product docs.
Add a domain, tap the addresses you want, and reply from one place. The first 14 days are free.