poste.io
poste.io: A broad self-hosted mail stack with a capable free edition and optional paid support. Ranked #34 of 34 in Mail Server Software by our editors (5.8/10); pricing: Free plan; best for free self-hosted mail with optional support tiers.
At a glance
- Editor score5.8 / 10
- PricingFree plan
- Best forFree self-hosted mail with optional support tiers
- Free planYes
- Paid from$349/yr
- Founded2014 · Klatovy, Czech Republic
- Facts checked21 Sep 2026
Where it wins
- Free edition supports unlimited domains and mailboxes
- Combines SMTP, IMAP, POP3, webmail, filtering and antivirus
- Includes SPF, DKIM, DMARC, SRS, REST API and ActiveSync support
Where it doesn't
- Deployment is self-hosted on a Linux server
- Mobile apps are provided through third-party options
- PRO+ costs $1,239 per year
Our verdict on poste.io
poste.io is a self-hosted email server for individuals and organizations that want to run mail infrastructure on their own Linux server. Distributed as one Docker container, it combines SMTP delivery and submission, IMAP and POP3 access, HTTPS webmail, spam filtering, antivirus, mailbox quotas, aliases, Sieve filtering, administration and a REST API. It is suited to teams that want control over domains, mailboxes and server operation rather than a hosted mailbox service.
The plan structure makes the free edition the main draw. FREE is for personal use and includes unlimited domains and unlimited mailboxes. PRO costs $349 per year and keeps unlimited domains and mailboxes while adding domain administrators, email support, diagnostics and log viewers. PRO+ costs $1,239 per year and adds transfer of current email accounts plus remote installation, updates and monitoring. The paid tiers therefore target organizations that need more administrative support, troubleshooting visibility or assistance with migration and ongoing operation.
poste.io also covers a wide range of mail-server requirements in one deployment. It supports configurable mailbox quotas and per-mailbox settings, redirects, aliases, autodiscovery, authentication records through SPF, DKIM, DMARC and SRS, and ActiveSync through Z-Push. Standard mail clients can connect through IMAP or POP3, while web access is available through HTTPS. The trade-off is the operating model: deployment remains self-hosted on Linux, and mobile access relies on third-party apps. Choose poste.io if a free, broad mail stack and server control matter; choose another option if you want a fully hosted service or a native mobile application.
Your product? Our editors can test poste.io in depth and publish a review, labelled as paid · from $99/mo →
poste.io pricing
All 3 poste.io plans and prices →
poste.io fact sheet
| Free plan | Yes |
|---|---|
| Paid from | $349/yr |
| License model | Not verified |
| Webmail interface | Not verified |
| IMAP/POP3 access | Not verified |
| Mobile sync | Not verified |
| Antispam tools | Not verified |
| Mailbox limit | Not verified |
| High availability | Not verified |
| Deployment | Self-hosted, Cloud |
| Platforms | Web, Linux |
| Compliance & security | GDPR |
| Support | Email, Docs |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Pricing | Free plan (source) |
| Website | poste.io |
| Facts checked | 21 Sep 2026 |
Alternatives to poste.io
- Microsoft Exchange OnlineA Microsoft-centric hosted mailbox service with Outlook, archiving, compliance, and migration tools.9.3
- Zimbra CollaborationA broad open-source suite for organizations that need email, collaboration, and deployment control.9.1
- IceWarpA broad hosted email suite with collaboration, migration tools, and self-hosted deployment.9.0
See all poste.io alternatives →
Also Ranked In
poste.io is ranked in 2 of our directories.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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