China Mobile 139 Mail (@139.com) · Enable Service + Set Client Password
China Mobile 139 Mail uses your phone number + @139.com (e.g., 13800138000@139.com). Connecting to Laifaxin takes 2 steps:
| Step | What | Required |
|---|---|---|
| 1 Enable IMAP/SMTP service in webmail | Disabled by default — turn it on at webmail [Settings → Account & Security] | Yes |
| 2 "Set" a client password | Note: you define it, not system-generated (unlike other mailboxes) | Yes |
When binding, paste the client password into the password field (not your 139 login password) — otherwise it fails 100% of the time.
Unlike QQ / 163 / Sina where the system auto-generates a 16-char auth code, 139 Mail lets you set a client password yourself.
This means:
- Upside: easier to remember (you chose it)
- Risk: if you set something weak (like
123456), your account is easily breached - Recommendation: use a strong password + different from your login password
1. Server Settings
| Type | Server | SSL Port |
|---|---|---|
| IMAP (incoming) | imap.139.com | 993 |
| SMTP (outgoing) | smtp.139.com | 465 |
Encryption: SSL / TLS
2. Get the Client Password
2.1 Settings → Account & Security
Sign in to 139 Mail webmail → top Settings → left Account & Security → find Mailbox Protocol Settings → ensure IMAP/SMTP service is enabled:
2.2 "Set" the client password
On the same Account & Security page → find Client Password → follow the prompts to set a new password yourself:
3 key reminders:
| Reminder | Detail |
|---|---|
| You define it | Not system-generated — type one in yourself |
| Use a strong password | 8+ chars + uppercase/lowercase + digits + symbols |
| Different from login password | Prevents one leak from compromising the main account |
Some accounts may require an SMS verification code for identity confirmation.
- BAD:
123456/password/139mail - BAD: same as your login password (one leak = both gone)
- GOOD:
LFx#2026@Mob/Mb!Mail#139Pwd(16 chars with letters, digits, symbols)
3. Bind in Laifaxin
Go to Laifaxin Email Accounts and add your 139 email:
| Field | What to fill |
|---|---|
| Email address | phone-number@139.com (e.g., 13800138000@139.com) |
| Password | Paste the client password (NOT the login password!) |
| IMAP server | imap.139.com · port 993 · SSL |
| SMTP server | smtp.139.com · port 465 · SSL |
After binding, turn on email sync + notifications (see Check New Emails).
Common Pitfalls
| Pitfall | Consequence | How to avoid |
|---|---|---|
| Using the login password | 535 Authentication failed | Must use the client password (the one you set) |
Client password too weak (e.g., 123456) | Account easily brute-forced | Use a strong password (8+ chars + upper/lower + digits + symbols) |
| Client password same as login password | One leak = both gone | Use different ones |
| IMAP/SMTP service not enabled | Binding fails (disabled by default) | First go to Settings → Account & Security and enable the service |
| Forgot the client password | Can't sign in to third-party clients | Go back to Settings to change the client password |
| Heavy mass sending via 139 Mail | Rate-limited or temporarily blocked within 24h | Personal mailboxes are 1-on-1 only; bulk → premium channels |
| Sharing one password across clients | One leak takes all down | Sharing is technically OK but not recommended; main clients should use strong passwords |
FAQ
Q1 · What is a "client password" and how does it differ from the login password?
The client password is the standalone password 139 Mail uses for third-party clients.
| Aspect | Login password | Client password |
|---|---|---|
| Use | Sign in to 139 Mail web / app | Used by third-party clients |
| How it's set | You define | You define (unique — most mailboxes auto-generate) |
| Revocation | Change password = all apps disconnect | Revoke individually without affecting main account |
| Leak risk | Main account at risk | Only that app affected |
| vs login password | — | Should be different |
Q2 · How does 139 Mail's "set" client password differ from QQ/163/Sina's "generated" auth code?
| Aspect | 139 Mail (set) | QQ/163/Sina (generated) |
|---|---|---|
| Who decides the password | You type it in | System randomly generates 16 chars |
| Customizable | Fully | No |
| Viewable later | Yes (it's the password you set) | No, shown once only |
| Security | Depends on your password strength | 16-char random string — higher security |
| Risk | Weak password = easy crack | Almost no crack risk |
→ 139 Mail demands more from you on password security — a strong password is mandatory.
Q3 · Forgot the client password?
| Step | Action |
|---|---|
| 1 | Go to 139 Mail webmail → Settings → Account & Security → Client Password |
| 2 | Click Change Client Password |
| 3 | After SMS verification, set a new password |
| 4 | In Laifaxin Email Accounts, update the password and save |
Q4 · How many emails can 139 Mail send per day?
139 Mail doesn't publish a hard limit, but heavy sending is strongly discouraged:
| Phase | Daily volume | Notes |
|---|---|---|
| Week 1 (new bind) | Start at 50 | 5–10 minute intervals |
| Weeks 2–4 | 100–200 | Watch for anomalies |
| Stable | Max 300 | Don't hit the cap |
→ Never "mass blast" at any stage! Mass blasting = 100% triggers anti-spam.
Truly need bulk sending? Use premium channels:
- Doesn't touch your 139 mailbox, no ban risk
- ¥0.007 per email, system auto-throttles
Q5 · Do I need a VPN for 139 Mail?
No. 139 Mail is a domestic Chinese service (China Mobile) — fast and stable from within China.
Q6 · Is 139 Mail good for foreign trade?
| Scenario | Fit | Notes |
|---|---|---|
| 1-on-1 client follow-up | Not recommended | Overseas customers have extremely low trust in @139.com (carrier mailbox + numeric local-part looks like spam) |
| Inquiry replies | Not recommended | Same as above |
| Bulk cold outreach | Not suitable | Overseas mail providers often route numeric mailboxes straight to spam |
| Multi-touch auto follow-up | Not suitable | Use smart sequence + premium channels |
Verdict: 139 Mail is mainly for domestic business + personal communication; for foreign trade, definitely use Gmail / Outlook / a custom-domain enterprise mailbox.
Q7 · What unique features does 139 Mail offer?
| Feature | Detail |
|---|---|
| Phone number = email address | Email is phone-number@139.com, super easy to remember |
| Cloud drive + mail integration | Integrates with China Mobile cloud drive, large attachments don't count against mailbox quota |
| SMS notifications | New mail can be sent as SMS alert (unique to China Mobile users) |
| Call assistant | Mail isn't missed during phone calls |
Learning Tips
| Topic | Advice |
|---|---|
| Set a strong client password | 8+ chars + upper/lower + digits + symbols, different from login password |
| Password management | Use a password manager (1Password / Bitwarden), label by purpose |
| Rotate periodically | Change the client password at least every 6 months |
| Pair with Laifaxin features | After binding, try email tracking / templates / smart sequence |
| Use premium channels for bulk | Bulk doesn't use 139 Mail — use premium channels |
| International mailboxes for foreign trade | For real foreign trade, use Gmail / Outlook or a custom-domain enterprise mailbox |
| Leverage phone-number perks | SMS notifications + phone-based binding — perks for China Mobile users |
Related Features
| Topic | Link | Description |
|---|---|---|
| Email account setup | email-account | Binding flow + error code troubleshooting |
| Common personal mailboxes | 100-gerenyouxiang-personal-mailbox | 16 mailbox quick-reference table |
| China Telecom 189 Mail (@189.cn) | 104-dianxin-189youxiang-telecom-personal-mailbox | Another carrier mailbox (China Telecom) |
| China Telecom 21cn Mail (@21cn.com) | 111-dianxin-21cnyouxiang-telecom-personal-mailbox | China Telecom's other mailbox brand |
| Tencent QQ Mail (@qq.com) | 106-tengxun-qqyouxiang-tencent-personal-email | System auto-generates auth code |
| NetEase Mail (@163.com) | 107-wangyi-163youxiang-netease-personal-email | System auto-generates auth code |
| Check new emails | check-new-emails | Enable sync + notifications after binding |
| Mass sending | email-mass-sending | Bulk: use premium channels |
Scroll to the bottom of this page, scan the customer-service WeChat QR (already in the footer) for 1-on-1 help — instant response during business hours, first thing next morning otherwise.
About China Mobile 139 Mail (@139.com)
What is 139 Mail?
139 Mail (China Mobile Mail) is the free personal email service from China Mobile. The name comes from China Mobile's 139 phone-number range — you can use your phone number as the local-part (e.g., 13800138000@139.com). It has a broad install base among China Mobile users.
Key 139 Mail features:
| Feature | Detail |
|---|---|
| Phone number = email address | Email is phone-number@139.com, super easy to remember |
| Cloud drive + mail integration | Deep integration with China Mobile cloud drive; large attachments don't count against mailbox quota |
| SMS notifications | New mail can trigger SMS alerts (unique to China Mobile users) |
| Call / mail assistant | Integrated with China Mobile communication services |
Why is 139 Mail unique?
139 Mail's "client password" mechanism differs from other mailboxes:
| Aspect | 139 Mail | QQ / 163 / Sina etc. |
|---|---|---|
| Client password | User-defined | System-generated 16 chars |
| Customizable | Fully | No |
| Viewable later | Yes | No, shown once |
| Revocation | Change the password | Delete the specific auth code |
| Security | Depends on user-chosen strength | 16-char random string — higher security |
Security recommendations:
| Recommendation | Detail |
|---|---|
| Strong password | 8+ chars + upper/lower + digits + symbols |
| Different from login password | Prevents one leak from compromising both |
| Rotate periodically | At least every 6 months |
| Use a password manager | Don't rely on memory |
Is 139 Mail good for foreign trade?
1-on-1 follow-up / inquiry replies Not recommended:
- Overseas customers have extremely low trust in domestic carrier + numeric mailboxes like
@139.com - Emails often land in overseas spam folders
- Reaching out to overseas customers from
139.com= very high failure rate
Bulk cold outreach Not suitable at all:
- Overseas mail providers reject or spam-fold them
- Triggers anti-spam rules
Foreign-trade verdict:
- Domestic use / personal communication → 139 Mail works (especially for China Mobile users)
- Foreign trade → Must use Gmail / Outlook or a custom-domain enterprise mailbox
- Bulk cold outreach → use premium channels (don't tie to 139 Mail)
Comparing the three carrier mailboxes
| Aspect | China Mobile 139 (@139.com) | China Telecom 189 (@189.cn) | China Telecom 21cn (@21cn.com) |
|---|---|---|---|
| Carrier | China Mobile | China Telecom | China Telecom |
| Password mechanism | Client password (user-set) | Login password | Login password |
| Phone-number mailbox | Yes | Yes | No |
| Setup difficulty | Medium (set client password) | Simple (enable service) | Simple (enable service) |
| Foreign-trade fit | Not suitable | Not suitable | Not suitable |
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