21CN Mail review
A practical free mailbox with broad mail-protocol support and paid capacity upgrades.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
21CN Mail is a personal email service from Tianyi Digital Life Technology Co., Ltd., designed for solo users and small-scale personal use. Its free plan provides webmail access for sending and receiving messages, while mobile access is available through iOS and Android. Standard POP, IMAP and SMTP support allows connection through compatible mail clients. Address-book management, signatures, templates, scheduled sending and mailbox collection add practical tools for everyday correspondence.
The service covers core mailbox management with spam filtering, virus protection, mail rules and block/allow lists. Users can also collect messages from other supported mailboxes, which makes 21CN Mail more suitable for consolidating personal accounts than a basic send-and-receive inbox. Support is available through email, chat, phone and documentation, with 24/7 support listed among the service channels. Its platform fit is therefore centered on web and mobile access plus standard email protocols, rather than a named application ecosystem.
Paid membership adds capacity and higher bulk-sending limits. The 尊贵版 plan provides a 16 GB mailbox, up to 200 recipients per bulk send and G-level security protection. 非凡邮 adds unlimited mailbox capacity, up to 500 recipients per bulk send, G-level storage, deleted-mail recovery and bulk-sending privileges. The published pricing records monthly plans with selectable 1-, 2- and 3-year service durations. 21CN Mail suits users who want free personal email with broad protocol support and extensive support coverage. Users seeking an ad-free mailbox or a more differentiated integration ecosystem should consider another service.
21CN Mail pros and cons
- Where it wins
- Free access with POP, IMAP and SMTP support
- Spam, virus, filtering and block/allow-list controls
- Web, iOS and Android access with 24/7 support
- Where it doesn't
- Commercial advertising may appear in the service
- The free plan is less differentiated than specialized alternatives
- No named third-party integrations are provided
21CN Mail fact sheet, pricing and score →
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