Open WebMail
Open WebMail: A free, focused webmail option for administrators running their own mail servers. Ranked #111 of 142 in Email Clients by our editors (3.0/10); pricing: Free plan; best for self-hosters wanting basic open-source webmail.
At a glance
- Editor score3.0 / 10
- PricingFree plan
- Best forSelf-hosters wanting basic open-source webmail
- Free planYes
- Paid fromFree
- App coverageWeb
- Facts checked24 Sep 2026
Where it wins
- Free and open source under the GNU General Public License
- Search, filters, attachments, address book, and calendar tools
- Integrates with POP3, SMTP, SpamAssassin, ClamAV, LDAP, and databases
Where it doesn't
- Requires a self-hosted mail server and administrator-managed deployment
- Browser-based access does not provide desktop or mobile clients
- Focused webmail scope lacks offline and send-later features
Our verdict on Open WebMail
Open WebMail is a free, open-source webmail system for administrators operating self-hosted mail servers. It provides browser-based email access with message composition, folders, attachments, full-content search with regular-expression support, filtering rules, a vCard-compatible address book, and a calendar with reminders and notifications. Its unified inbox support and ability to retrieve mail from multiple POP3 accounts make it suited to basic centralized mail access through a browser.
Deployment is aimed at administrators rather than individual users looking for a hosted mailbox. Open WebMail supports Apache with CGI and Perl, can relay messages through SMTP, and connects with external SpamAssassin and ClamAV services. Its integration surface also includes LDAP, MySQL, PostgreSQL, and PAM. These options fit environments where mail delivery, authentication, storage, and filtering are already managed across self-hosted infrastructure. The setup model is therefore a better match for technically managed servers than for teams seeking a ready-to-use cloud client.
The product’s strength is focused coverage: email, search, filtering, attachments, contacts, calendar tools, and server-side integrations are combined in a web interface. That scope should suit self-hosters who want straightforward open-source webmail without a commercial plan structure. It is less suitable for people who need a desktop or mobile application, offline access, or send-later workflows. Buyers seeking a broader multi-platform email client should choose a product built around those capabilities instead, while administrators prioritizing browser access on their own mail servers may find Open WebMail a practical fit.
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Open WebMail pricing
Open WebMail fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| App coverage | Web |
| Account limit | Not verified |
| Unified inbox | Not verified |
| Offline access | Not verified |
| Scheduled sending | Not verified |
| Calendar tools | Yes |
| Deployment | Self-hosted |
| Platforms | Web |
| Support | Docs |
| Built for | Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 2 integrations: SpamAssassin, ClamAV |
| Pricing | Free plan |
| Website | openwebmail.org |
| Facts checked | 24 Sep 2026 |
Open WebMail integrations
Open WebMail lists 2 integrations on its own site.
- SpamAssassin
- ClamAV
Alternatives to Open WebMail
- Mozilla ThunderbirdA capable free client for multi-account email, offline access, and desktop productivity tools.9.4
- Zoho MailA flexible hosted email service with free access, migration tools, and Zoho collaboration options.9.2
- Apple MailA capable Apple-focused email client with unified inboxes, scheduling, privacy controls, and AI assistance.9.1
See all Open WebMail alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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