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MailStack

API—OSS—FREEyesDOCS4/5
MA5.8#10 of 30
outWeb—Windows—Mac—Linux—Android—iOS

Ranked in Shared Inbox Software ·Free plan

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About

MailStack is ranked #10 of 30 in shared inbox software on Inferse. It runs on Self-hosted, Web. There is a free plan.

Compared on shared inbox software

Mail platforms
standalonevib.tools

Facts

Purpose
MailStack is an open-source, self-hosted mail server and shared team inbox for controlled, receive-only business email.vib.tools · 4 Oct 2026
Inbox features
The web inbox supports search, pagination, read and unread state, attachment filters, message previews, live polling, and browser notifications.vib.tools · 4 Oct 2026
Mailbox access
It provides administrator and ordinary-user accounts, object-level mailbox isolation, and shared mailbox memberships.vib.tools · 4 Oct 2026
Message handling
MailStack uses Maildir ingestion with duplicate-delivery protection, malformed-message recovery, HTML sanitization, and blocking of remote and active content.vib.tools · 4 Oct 2026
Attachments
Attachments are stored in confined protected storage and downloaded through authorized routes.vib.tools · 4 Oct 2026
Security
Listed controls include Argon2 password hashing, login throttling, CSRF protection, secure production cookies, and least-privilege database access.vib.tools · 4 Oct 2026
Mail flow
The reference deployment receives mail via Postfix and delivers it through Dovecot LMTP; it excludes public SMTP submission, IMAP, POP3, and open relay.vib.tools · 4 Oct 2026
Deployment requirements
The supported reference deployment is a single-node Ubuntu Server 24.04 LTS VPS with public DNS and reachable inbound ports 25, 80, and 443.vib.tools · 4 Oct 2026
Operations
The project lists health and readiness endpoints, structured security audit logging, and backup, restore, rollback, and verification tooling.vib.tools · 4 Oct 2026
Notable limits
The reference deployment excludes public user registration, outbound campaigns, multi-node or high-availability deployment, and a public administrative API.vib.tools · 4 Oct 2026
Intended users
MailStack is designed for teams needing self-hosted business inboxes with per-user shared mailbox authorization and controlled receive-only email.vib.tools · 4 Oct 2026
License
The source code is licensed under GNU AGPL version 3.0 or later.github.com · 4 Oct 2026
Support
Vib Tools lists product support by email and provides a Bangladesh head office address in Kurigram, Rangpur.vib.tools · 4 Oct 2026

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Where it ranks on Inferse

Sources