MepMail

Email for apps and AI agents: a Resend-compatible sending API with SMTP, plus mailboxes on your own domain that agents read and draft in over MCP, where you choose direct sending or approval for each reply. AGPL open source and self-hostable.

EmailOpen sourceNewFree tier listed

Pricing as listed on the vendor site on Oct 27, 2026: free tier Send Free: $0/mo, 100 emails a day (about 3,000 a month), 1 domain, 1 workspace, 1,000 contacts, no card; paid from $9 per month (Send Starter), 1,500 emails a day, with a free plan of 100 a day.

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