MarbleSend is independent, production-ready email marketing software written in PHP 8.2 and MySQL. It runs on the affordable shared web hosting you already pay for without requiring VPS, Docker, or Redis.
- Database-backed queue worker: Resilient email queue that resumes automatically if hosting restarts.
- Deliverability Checker: Integrated SPF, DKIM, and DMARC diagnostics with copy-ready DNS recommendations.
- Delivery Options: Bring your own SMTP (Amazon SES, Postmark, Mailgun, Brevo) or use built-in Managed Amazon SES Relay.
- Admin security: Two-factor login (TOTP), Cloudflare Turnstile on signup forms, and login lockout with email alerts.
- One-time payment: Perpetual license with no per-contact fees, and a 14-day refund.