MailStack
MailStack: A self-hosted inbox for secure mailbox access, without outbound email or team collaboration tools. Ranked #27 of 30 in Shared Inbox Software by our editors (6.5/10); pricing: Open source; best for self-hosted teams needing secure mailbox access.
At a glance
- Editor score6.5 / 10
- PricingOpen source
- Best forSelf-hosted teams needing secure mailbox access
- Paid fromFree
- Facts checked19 Sep 2026
Where it wins
- Per-user mailbox authorization with administrator-managed memberships
- Search, read/unread state, pagination, and attachment filters
- Includes audit logging and backup, restore, rollback, and verification tooling
Where it doesn't
- Receive-only; not a replacement for outbound email services
- No verified internal comments, assignment, or collision detection
- Requires teams to manage their own self-hosted infrastructure
Our verdict on MailStack
MailStack is an open-source, self-hosted shared inbox for organizations that manage their own email infrastructure and need controlled browser access to incoming mail. Administrators manage users and mailbox memberships, with per-user authorization for shared mailboxes. It is designed for receive-only business email, so teams looking for a hosted service or a tool that also handles outbound email should look elsewhere.
The deployment is built around Postfix and Dovecot LMTP for mail delivery, with MariaDB, Nginx, Gunicorn, and systemd among its listed integrations. The reference setup targets Ubuntu Server 24.04 and offers one-click VPS installation. That makes MailStack a fit for teams comfortable operating a server and its supporting services; it is less suitable for groups that want a managed inbox without infrastructure responsibilities. Its standalone mail-platform fit keeps the focus on mailboxes the organization manages itself.
For day-to-day reading, MailStack includes message search, pagination, read/unread state, attachment filters, and sanitized HTML and plain-text rendering. Attachment downloads use authorization checks, while browser notifications surface newly indexed messages. Operational audit logging, health monitoring, and backup, restore, rollback, and verification tooling address administration and continuity. The receive-only scope is also a meaningful boundary: collaboration features such as comments, assignment, and collision detection are not verified. Choose MailStack for self-hosted, access-controlled inbound mail; choose another shared inbox if your workflow depends on coordinated replies or built-in collaboration.
Your product? Our editors can test MailStack in depth and publish a review, labelled as paid · from $149/mo →
MailStack pricing
MailStack fact sheet
| Free plan | Not verified |
|---|---|
| Paid from | Free |
| Shared mailboxes | Not verified |
| Internal comments | Not verified |
| Collision detection | Not verified |
| Assignment automation | Not verified |
| Mail platforms | Standalone |
| Mobile apps | Not verified |
| Deployment | Cloud, Self-hosted |
| Platforms | Web |
| Integrations | 6 integrations: Postfix, Dovecot LMTP, MariaDB, Nginx, Gunicorn, systemd |
| Pricing | Open source |
| Website | vib.tools |
| Facts checked | 19 Sep 2026 |
MailStack integrations
MailStack lists 6 integrations on its own site.
- Postfix
- Dovecot LMTP
- MariaDB
- Nginx
- Gunicorn
- systemd
Alternatives to MailStack
- FrontA full-service support workspace with shared inboxes, ticketing, and omnichannel tools.9.4
- HiverHiver combines collaborative email, ticketing and helpdesk features, with a 7-day trial and paid tiers.9.2
- Help ScoutA free-to-paid support platform with strong collaboration, automation, and help-center depth.9.1
See all MailStack alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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