Community is free, Enterprise is built to scale
One engine, two editions: Community and Enterprise run the same in-house Mailezine engine with identical protocols and features — the editions differ only in storage scale and licensed features. Your data always stays on your own servers.
Community
A self-hosted mail system for individuals, small teams and budget-first setups.
- ✓ Complete mail system (SMTP / IMAP / POP3 / Sieve)
- ✓ Modern Webmail + admin console
- ✓ Baseline anti-spam (reputation / DNSBL / lists) + DKIM / DMARC
- ✓ Mailezine engine + Pebble KV / local-FS storage
- ✓ PGP / 2FA / remote image blocking
- ✓ Docker Compose deployment
- ✓ Community support (GitHub)
Enterprise
A perpetual license tiered by mailbox count, with year-one support and upgrades included — built for enterprise procurement, acceptance and long-term budgeting.
- ✓ Everything in Community
- ✓ The same Mailezine engine upgraded to distributed storage
- ✓ TiDB KV + MinIO/S3 pluggable, multi-instance HA
- ✓ Mobile sync: EAS / CardDAV / CalDAV
- ✓ Archive, DLP approval & AD/LDAP integration
- ✓ S/MIME, delegation and the AI assistant
- ✓ Perpetual license, bought by mailbox count
- ✓ Year one includes support + SLA + launch assistance
- ✓ Annual service ~15% of the license
Enterprise license pricing
The software is a perpetual license (one-time purchase of the usage right); service is billed annually. The year-one license fee includes one year of technical support and upgrades, then renew annually with the service fee. Service is decoupled from the license, so community users can subscribe to it too. Prices include tax.
| Mailboxes | License (incl. year-one service) | Annual service |
|---|---|---|
| 25 | ¥3,800 | ¥570 |
| 50 | ¥5,500 | ¥830 |
| 100 | ¥6,800 | ¥1,020 |
| 260 | ¥8,200 | ¥1,230 |
| 500 | ¥10,000 | ¥1,500 |
| 1,000 | ¥12,800 | ¥1,920 |
| 2,000 | ¥16,000 | ¥2,400 |
| 5,000 | ¥21,000 | ¥3,150 |
| 10,000 | ¥27,000 | ¥4,050 |
| Unlimited | ¥35,000 | ¥5,250 |
Tier ≤ 100 mailboxes · ≈ ¥68 per mailbox. Year one includes support and upgrades. Tax included.
Pick a scale and send — sales replies within one business day with a quote, a 30-day full-feature trial license and deployment advice.
Email sales (101-500 mailboxes)An annual subscription (¥99 / user / year) is also available for MSPs and cloud-hosted scenarios; contact contact@mailez.net for procurement and deployment specifics.
Enterprise measured: why Mailezine
Single binary, zero IPC
One Go executable carries the mail core: SMTP / IMAP / ManageSieve / queue / DKIM all happen in-process with no cross-process round trips. In the enterprise edition, spam filtering and DNS resolution come pre-wired through Rspamd / Unbound in the compose stack — no manual install-and-wire (the community edition uses the in-process baseline filter).
Object-storage native
KV (TiDB by default) holds metadata, MinIO/S3 holds bodies. The blob layer scales horizontally, and single-request S3 uploads cut SMTP p95 from 7.29s to 0.77s.
Native cross-platform
Runs natively on Linux / macOS / Windows — statically compiled, copy-and-run. Development and production environments match.
FTS full-text search
Built-in bleve indexing with word/prefix semantics. SEARCH TEXT queries the index first, then verifies against the original — never loses mail; optional Tika extracts attachment text.
Mobile work & compliance
Exchange ActiveSync for native iOS / Outlook access; CardDAV / CalDAV sync contacts and calendars; archive, DLP approval and AD/LDAP directory integration cover regulated-industry audit requirements.
Multi-instance HA
Active-passive lease election over a shared KV volume + MinIO blob storage. Failover verified with real e2e tests.
A smooth upgrade path
Both editions share the same engine and control plane: an upgrade only touches storage and licensing — the UI and your habits stay unchanged. Traditional Postfix + Dovecot deployments migrate one-way into KV (Pebble / TiDB) with the built-in tool, preserving order, flags, keywords and internal dates.
Community vs Enterprise: full comparison
Both editions run the same Mailezine engine and share the same Webmail and admin console; the differences are in storage scale and licensed features.
| Comparison | Community | Enterprise |
|---|---|---|
| Engine | Mailezine (the same in-house single binary) | Mailezine (the same in-house single binary) |
| License & pricing | Free & open source (AGPL-3.0) | Commercial license · perpetual, tiered by mailbox count |
| Storage | Pebble KV + local FS (single node) | TiDB KV + MinIO/S3 pluggable (distributed) |
| Mail protocols | SMTP / IMAP / POP3 / ManageSieve + implicit TLS 465/993/995 | Same |
| Webmail + Admin | Full featured | Full featured |
| Mobile sync (EAS / CardDAV / CalDAV) | — | Native iOS / Outlook ActiveSync + contacts & calendar sync |
| Spam & security | Built-in baseline anti-spam (reputation/DNSBL/lists) + DKIM/DMARC + MTA-STS/DANE | Baseline plus self-learning Rspamd and macro/malware attachment scanning |
| Encryption | PGP | PGP + S/MIME |
| Enterprise compliance (archive / DLP / LDAP) | — | Full archive with review, outbound DLP approval, AD/LDAP directory integration |
| Full-text search | Built-in bleve FTS (Tika attachment indexing available) | Same |
| Multi-instance HA | — | Active-passive lease-based automatic takeover |
| Cross-platform | Native Linux / macOS / Windows | Same |
| Measured performance | In-house engine baseline (4.4× vs the traditional stack) | Same; distributed storage scales out |
| Support | Community (GitHub) | Commercial support + SLA + launch assistance |
FAQ
What does AGPL-3.0 mean for my deployment?
Your obligations are triggered only when you redistribute a modified version or offer it as a network service to external users — in which case those users are entitled to the corresponding source. Deploying it internally for your own staff triggers no source-disclosure obligation at all. We follow the AGPL text as written, with no extra interpretation.
Will existing open-source features turn paid?
No. The community edition's boundary is defined by what the enterprise edition adds, never by what the community edition takes back — no rug-pull license changes. Every ✓ in the comparison table is committed to stay in the community edition for the long term.
What's the functional difference between Community and Enterprise?
Webmail, admin console, spam filtering, DKIM/DMARC, PGP, 2FA and implicit TLS are identical in both editions — because both run the same Mailezine engine. The differences are exactly two: storage scale (Community is single-node Pebble; Enterprise is distributed TiDB + MinIO/S3 with multi-instance HA) and licensed features (archive, DLP, AD/LDAP, EAS, S/MIME, delegation and the AI assistant are Enterprise).
Is deployment complex? Do I need a dedicated mail admin?
The community edition is brought up entirely by Docker Compose; Enterprise Mailezine is a single binary — copy and run. Day-to-day operations (creating mailboxes, DKIM setup, audit logs) all happen in the admin console; no Linux mail expert required.
Which mail clients are supported?
Everything speaks standard protocols: Outlook, Foxmail, Thunderbird, Apple Mail and mobile mail apps all connect over IMAP / SMTP / POP3, with implicit TLS on 465/993/995 enabled by default. The built-in Webmail also supports offline PWA and keyboard shortcuts.
Does push work on phones? Is it in the community edition?
Yes. iPhones receive new-mail push over IMAP IDLE — available in both the community and enterprise editions. Native Outlook sync and Exchange ActiveSync push (mail, contacts, calendar, remote wipe) come with the enterprise edition's EAS support.
Where does the AI assistant send my mail? Is it safe?
AI providers are configured centrally by your administrator — they can point at on-premises local models (e.g. Ollama) so mail data never leaves your infrastructure. Users cannot connect external AI services themselves, and what content went to which model stays under control. That is exactly why AI ships with the enterprise edition only.
How is data security handled?
Data lives entirely on your own servers. Transport is protected by MTA-STS / DANE and optional implicit TLS; content supports PGP signing/encryption; the community edition ships built-in baseline anti-spam (reputation / DNSBL / lists), while the enterprise edition adds self-learning Rspamd and macro/malware attachment scanning; accounts have 2FA and app tokens, and every admin action is audited.
Can I upgrade from Community to Enterprise later?
Yes. Both editions run the same engine and share the same backend control plane and admin UI: an upgrade only involves the storage backend (Pebble → TiDB + MinIO/S3) and the license file — the UI and your habits stay unchanged. Traditional Postfix + Dovecot deployments have a built-in one-way migrate tool that preserves order, flags, keywords and internal dates.
How do I purchase Enterprise and how is it billed?
Enterprise is a perpetual software license tiered by mailbox count (from ¥3,800 for 25 mailboxes): the usage right is a one-time purchase, the mailbox cap is enforced forever and the license never expires. Service (technical support and version upgrades) is a separate annual subscription — the first year is included in the license fee, renewals are about 15% of the license per year. Service is decoupled from the license, so community users can subscribe to it too; an expired service never stops the system, renewing restores support and upgrades. Prices include tax, with 13% product and 6% service invoices available for enterprise procurement. An annual subscription (¥99 / user / year) is also available for MSPs and cloud hosting. For specifics, contact sales at contact@mailez.net.
Start free, upgrade when you scale
Community is available today; Enterprise upgrades on demand. Your data always stays on your servers.