What are the correct server settings and steps to configure 138 Enterprise Email on standard email clients like Outlook or mobile devices?

You can configure 138 Enterprise Email on Outlook, mobile devices, and other standard email clients using IMAP/SMTP protocols with SSL/TLS encryption. The setup requires your full email address as username, proper server addresses, and authentication verification.
Configuration Requirements:**
Active 138 Enterprise Email account with valid credentials
Full email address (username@yourdomain.com) as login
Support for standard IMAP/SMTP protocols with SSL/TLS
Mobile app or desktop client supporting secure email protocols
Server Settings:**
Incoming Server (IMAP):** Requires SSL/TLS on standard port 993
Outgoing Server (SMTP):** Requires authentication and SSL/TLS on port 465 or 587
Username:** Your complete email address
Authentication:** Standard password or app-specific password if enabled
Setup Steps:**

1. Open your email client (Outlook, mobile mail app, etc.)
2. Add new email account and select manual setup
3. Choose IMAP account type
4. Enter full email address as username
5. Input server addresses provided during account activation
6. Enable SSL/TLS for both incoming and outgoing servers
7. Complete authentication and send test email

Verification & Boundaries:**
Test login on web, mobile, and desktop clients separately
Verify sending to internal and external addresses (QQ/163, Gmail/Outlook)
Configuration supports web, mobile apps, PC clients, and third-party standard protocol clients
Does not include custom API integrations or unsupported client applications
Next Steps:** After configuration, set up email signatures, auto-replies, and recovery options. Contact 138 official support if you encounter authentication failures or cannot send/receive test emails.