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In Development

MailStackOS

SMTP Email Infrastructure

About MailStackOS

MailStackOS is email infrastructure for teams that need to own their email pipeline. Built with Hono (edge-compatible API), BullMQ for reliable delivery, and Postfix on Hetzner Cloud droplets. DKIM, SPF, and DMARC setup is automated. Delivery analytics show open rates, bounce rates, and complaint rates in real time.

Features

Hono edge-compatible API for email events
BullMQ reliable delivery queue
Postfix SMTP relay on Hetzner Cloud
Automated DKIM, SPF, DMARC setup
Delivery analytics and bounce handling

Business Gold

$24/mo

Complete business operations suite: accounting, contracts, proposals, leads, newsletters.

✓AccountingOS unlimited invoices and VAT filing
✓ContractsOS e-signatures and templates
✓ProposalOS client-facing proposals
✓LeadsOS CRM and pipeline management
✓NewsletterOS unlimited subscribers

Interested in MailStackOS?

MailStackOS is currently in development. Join the waiting list to get early access and shape the product with your feedback.

Join the Waiting List

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MailStackOS

Email Infrastructure

Self-hosted SMTP email infrastructure with Hono API, BullMQ queue, Postfix relay, and Hetzner deployment.