Mail-in-a-Box — Self-Hosted Mail Server
Self-Hosted Mail Server in a Box — CC0 Public Domain · v75 · 15.3k+ Stars · Postfix + Dovecot + Roundcube + Nextcloud · Google Workspace / M365 Alternative
Upstream projectOpen-source · Source-owned · You keep the stack
What it does
What can Mail-in-a-Box do?
Every Mail-in-a-Box capability MithTech configures, on a real deployed customer workload.
CC0-1.0 (public-domain dedication — most permissive licence possible) · v75 (April 20, 2026) · 15.3k+ stars · maintained 12+ years
most permissive licence possible) · v75 (April 20, 2026) · 15.3k+ stars · maintained 12+ years
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A day in the life
How does Mail-in-a-Box work?
How MithTech takes Mail-in-a-Box from scope to production — the mockup advances as you scroll.
Audit & scope
Indian and global mid-market operators (5–100 mailboxes) replacing Google Workspace ($6–18/user/mo, ₹500–1,500/user/mo) or Microsoft 365 ($6–22/user/mo, ₹500–1,800/user/mo) with self-hosted email for cost savings + data sovereignty + DPDP/HIPAA-equivalent compliance positioning; agencies hosting per-client mail under client-owned domains; privacy-conscious professionals (law firms, healthcare practices, journalists, NGOs); SaaS founders who want their own custom-domain mail without surveillance-economy exposure. A free 30-minute call maps where Mail-in-a-Box pays back inside year one and locks the scope — with an honest read on where Mail-in-a-Box doesn't fit.
Deploy on your infrastructure
MithTech stands Mail-in-a-Box up on infrastructure you own — your cloud or servers, with Indian data residency. Your Mail-in-a-Box source code, schemas, and operational keys stay with you.
Customise & integrate
We connect Mail-in-a-Box to the tools (including Mautic, Listmonk, CloudPanel) and tailor fields, roles, and infrastructure workflows so Mail-in-a-Box matches how your team actually works.
Train & roll out
Every team that will use Mail-in-a-Box gets onboarding and documentation written for your tenant, and MithTech stays on the support thread through the first 30 days of Mail-in-a-Box go-live.
Operate & evolve
Optional managed operations keep Mail-in-a-Box monitored, patched, and upgraded as its infrastructure roadmap moves — with Mail-in-a-Box you pay only for what you use.
Compare
Mail-in-a-Box vs the alternatives
Honest, side-by-side. No “leading” claims — just what each option does and what it costs.
How MithTech-deployed Mail-in-a-Box compares to Managed proprietary cloud for indian and global mid-market operators (5–100 mailboxes) replacing Google Workspace ($6–18/user/mo, ₹500–1,500/user/mo) or Microsoft 365 ($6–22/user/mo, ₹500–1,800/user/mo) with self-hosted email for cost savings + data sovereignty + DPDP/HIPAA-equivalent compliance positioning; agencies hosting per-client mail under client-owned domains; privacy-conscious professionals (law firms, healthcare practices, journalists, NGOs); SaaS founders who want their own custom-domain mail without surveillance-economy exposure. Specifics confirmed during the Mail-in-a-Box audit.
Savings estimator
Estimate your savings with Mail-in-a-Box.
Move the sliders. Numbers update live. Final price comes after a free 30-min audit.
How many people use Mail-in-a-Box day-to-day — we compare that against Managed proprietary cloud per-seat pricing.
- •Proprietary SaaS in this category typically charges ₹600–₹2,400 / user / month
- •You pay infrastructure + Mithtech managed-ops; no per-seat ceiling
- •Setup is a one-time investment; savings compound from year 2 onward
- •Final scope locked in a free 30-min audit
Audit is free · No credit card · No sales pressure
FAQ
Frequently asked questions about Mail-in-a-Box
Things prospects actually ask us in the first 30-min call. Click to expand.
Get Mail-in-a-Box running in weeks, not quarters.
A 30-min audit. Honest scope. We deploy on infrastructure you own — source, data, runtime stay with you.
Open-source · Source-owned · You keep the stack
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View productNot sure where to start?
Know your budget? Plan your Mail-in-a-Box — Self-Hosted Mail Server stack.
Three minutes, no signup wall. We ask about your sector, team size, compliance, urgency — and your budget — and recommend a full open-source stack across ERP, commerce, CRM and marketing, with a cost band and a go-live timeline you can download as a PDF proposal. If you already know your number, share it and we will pick the highest-value task that fits.
No email required. The PDF is yours to keep.