EndPaper Mail Server edition
Install the same server that runs endpapermail.com on your VPS or in your data center. You keep the data, the keys and the domain. Every security feature comes free in every edition. Paid licenses add branding, team tools and hosting features, with unlimited mailboxes on one flat monthly price.
A private @endpapermail.com mailbox on our servers. We run, patch and back up everything. From $0, paid plans from $2.99 a month. Hosted plans
The full server on your own machine for your company, your clients or your family. You run it, so you hold the data. From $0, paid licenses from $4.99 a month.
Free with both. The Android app also connects straight to Gmail, Yahoo, iCloud, AOL, Fastmail, Zoho, GMX or any IMAP mailbox.
Each license covers one installation on up to 5 servers. No per-mailbox fees on any plan. Billed monthly through Stripe. Cancel anytime.
For testing, home labs and small groups.
For a business or family on its own domain.
For teams with an admin and many users.
For web hosts and MSPs selling mail to clients.
Prices in US dollars, before any sales tax. Checkout asks for your mail server hostname. We email your signed license key to the address you paid with. Manage or cancel any time in the billing portal.
| Feature | Community | Pro | Business | Hosting |
|---|---|---|---|---|
| Price a month | $0 | $4.99 | $14.99 | $39.99 |
| Mailboxes | Unlimited | Up to 25 | 250 included, then $0.10 each a month | 500 included, then $0.08 each a month |
| Domains | Unlimited | Unlimited | Unlimited | Unlimited |
| Servers per installation | Any | Up to 5 | Up to 5 | Up to 5 |
| Password-free sign-in, passkeys, authenticator codes | Yes | Yes | Yes | Yes |
| Post-quantum keys, OpenPGP, MLS, signed key log | Yes | Yes | Yes | Yes |
| Sealed inbound mail and protected message portal | Yes | Yes | Yes | Yes |
| Webmail and Android app | Yes | Yes | Yes | Yes |
| Footer on sent mail | Yes | No | No | No |
| Custom branding | No | Yes | Yes | Yes |
| White-label branding | No | No | Yes | Yes |
| Team administration | No | No | Yes | Yes |
| Per-domain branding | No | No | No | Yes |
| Fleet management | No | No | No | Coming soon |
| Support | Documentation | Priority email | Priority email |
The server is written in Rust. Account data lives in PostgreSQL with row-level security forced on all 29 tables that hold it, so one tenant never reads another tenant's rows.
OPAQUE keeps passwords off the server. Passkeys work only on your own domain. Authenticator codes fail closed and lock after too many wrong tries.
Users create ML-KEM post-quantum keys on their own devices. The gateway seals mail on arrival, and a signed key log proves nobody swapped a key.
DANE checks on the mail gateway, TLS 1.2 or newer on IMAP, ClamAV attachment scanning and Sieve rules that run at delivery.
Services run as an unprivileged user with no new privileges and a read-only system. The web app sends a strict Content Security Policy with Trusted Types and HSTS.
Release packages carry an Ed25519 signature. Database upgrades run as numbered migrations that refuse to apply out of order.
Users connect Outlook, Apple Mail, Thunderbird or Gmail mobile. The server hands out an Apple Mail profile and Thunderbird setup file.
Scheduled send up to 30 days ahead, snooze up to 90 days, undo send, out-of-office replies, templates, contacts and keyboard shortcuts.
EndPaper charges one price per installation with a large mailbox allowance. Other self-hosted mail servers charge for every mailbox.
| Product | Free edition | Paid price | Mailbox limit on paid plan | Post-quantum keys |
|---|---|---|---|---|
| EndPaper Mail Server | Yes, unlimited mailboxes | $4.99, $14.99 or $39.99 a month per installation | 25 on Pro. 250 on Business and 500 on Hosting, then $0.10 or $0.08 per extra mailbox a month | Yes |
| Stalwart Enterprise | Yes (Community, no mailbox limit) | €2.00 per mailbox a year (25 to 499 mailboxes), 25 mailbox minimum | Priced per mailbox | Not listed |
| SmarterMail Professional | Not listed | $550 for 50 mailboxes, $950 for 250 | By tier | Not listed |
| SmarterMail Enterprise | Not listed | $700 for 50 mailboxes, $1,200 for 250 | By tier | Not listed |
Example: 100 mailboxes for 12 months costs $179.88 on EndPaper Business and €200 on Stalwart Enterprise. Competitor prices come from stalw.art/pricing and smartertools.com/smartermail/pricing, checked November 7, 2026. SmarterMail does not state a billing period for those base prices. Prices change. Check each vendor's site for current figures.
Yes, on paid plans. A mailbox counts when it signed in during the last 31 days. Pro covers up to 25 mailboxes. Business includes 250 and Hosting includes 500. Each extra mailbox costs $0.10 a month on Business and $0.08 a month on Hosting, billed automatically. The free Community edition has no mailbox limit. Over the Pro limit, existing mailboxes keep working and a new mailbox asks you to upgrade. Every license covers one installation on up to 5 servers.
No. Password-free sign-in, passkeys, authenticator codes, post-quantum encryption, the signed key log and forced row-level security come with the free Community edition.
Your server keeps running on the Community edition. Branding and team features switch off, and the footer returns to sent mail. No mail gets deleted.
Enter your mail server hostname at checkout. We email a signed license key for that hostname to the address you paid with.
Yes. Write to support@endpapermail.com with the new hostname and we issue a new key.