What's new

simmail is open. Point your app at it over SMTP, IMAP, the API or MCP, and write to simulated people who read, ignore, click, junk, bounce and reply, each in their own voice and their own time. Nothing ever reaches a real inbox.

• A live dashboard: every inbox, every person, and why they did what they did.
• People with temperaments, working or personal hours, memories, and promises they keep or forget.
• The World: mail that arrives on its own, from leads and customers to spam and phishing.
• Email health reports, a Junk folder that follows the spam score, and chaos on demand.
• Wait endpoints and a skip-ahead clock for tests, and an MCP server for AI agents.
• Free email tools: SPF, DMARC, DKIM, MX, MTA-STS and an email header analyzer.