Nmail
Nmail: A focused open-source option for encrypted, relay-based email across three platforms. Ranked #136 of 142 in Email Clients by our editors (3.0/10); pricing: Open source; best for users exploring decentralized Nostr email.
At a glance
- Editor score3.0 / 10
- PricingOpen source
- Best forUsers exploring decentralized Nostr email
- Paid fromFree
- App coverageAll
- Facts checked20 Sep 2026
Where it wins
- NIP-44 encryption and NIP-59 gift wrapping
- Encrypted MIME attachments through Blossom servers
- Web, Android, and Linux apps with offline caching
Where it doesn't
- Email transport depends on Nostr relays
- SMTP interoperability requires bridges
- A narrower alternative to conventional provider-hosted email
Our verdict on Nmail
Nmail is an open-source reference email client and protocol for people exploring decentralized, Nostr-based mail. It provides clients for the web, Android, and Linux, with folders, read states, and settings synchronized across devices. Its core transport uses Nostr relays rather than a conventional provider-hosted inbox, making it a focused choice for users who value decentralized delivery and encrypted communication.
Privacy and message handling are the product’s clearest strengths. Nmail supports NIP-44 encryption and NIP-59 gift wrapping, while encrypted MIME attachments are handled through Blossom servers. Offline local caching supports access without a continuous connection, and synchronization keeps folders, read states, and settings aligned across supported clients. These capabilities make Nmail more suited to decentralized workflows than to users simply seeking a conventional email application with a familiar provider model.
Interoperability is available through SMTP bridges, and the published project also includes Flutter and JavaScript libraries for developers building compatible clients or integrations. That gives Nmail a path into mixed email environments while keeping Nostr relays at the center of its design. The trade-off is architectural: SMTP access depends on bridges, and the relay-based model may be less suitable for users who want a conventional inbox experience. Pick Nmail for open-source, encrypted, decentralized email across web, Android, and Linux; choose a broader conventional client if your priority is standard provider-hosted mail workflows.
Your product? Our editors can test Nmail in depth and publish a review, labelled as paid · from $149/mo →
Nmail pricing
Nmail fact sheet
| Free plan | Not verified |
|---|---|
| Paid from | Free |
| App coverage | All |
| Account limit | Not verified |
| Unified inbox | Not verified |
| Offline access | Yes |
| Scheduled sending | Not verified |
| Calendar tools | Not verified |
| Deployment | Cloud, Desktop, Mobile |
| Platforms | Web, Android, Linux |
| Built for | Solo, Small business (editorial estimate) |
| Integrations | 3 integrations: Nostr relays, SMTP bridges, Blossom servers |
| Pricing | Open source |
| Website | nostrmail.org |
| Facts checked | 20 Sep 2026 |
Nmail integrations
Nmail lists 3 integrations on its own site.
- Nostr relays
- SMTP bridges
- Blossom servers
Alternatives to Nmail
- 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
Also Ranked In
Nmail is ranked in 2 of our directories.
Used Nmail? Be the first to review it
The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used Nmail for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.
Write a reviewTwo minutes · verified accounts only · read by an editor before it appears
Featured on iTechGuides
Nmail is listed in our Email Clients directory. Add the badge to your site — it links back to this page.
<a href="https://www.itechguides.com/products/nmail/"><img src="https://www.itechguides.com/best/badge/nmail.svg" alt="Featured on iTechGuides" width="230" height="46"></a>
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
Last updated · How we research and update