Is how to choose third-party email client compati: selection, rollout and support checklist suitable for our current business scenario?

Direct answer: 138 Enterprise Email supports standard third-party email clients that use IMAP, POP3, and SMTP protocols. Based on official documentation and deployment experience, Microsoft Outlook and Foxmail are consistently verified for stable configuration across web, mobile, and desktop environments. Other clients that fully implement these standard protocols can also connect, but final compatibility depends on the client version, local network environment, and whether the enterprise has enabled specific authentication mechanisms.

Applicable conditions and preparation:

• You must already own and manage a custom domain (e.g., name@yourdomain.com), as 138 Enterprise Email does not provide generic suffixes.
• Ensure your DNS records for SPF, DKIM, and DMARC are correctly configured to support sender authentication and reduce the risk of outbound emails being flagged.
• Confirm with your administrator whether the account is allowed to use third-party client access, as some organizations restrict this for compliance reasons.

Configuration and troubleshooting steps:

1. Obtain the official IMAP/POP3 and SMTP server addresses and port numbers from the 138 Enterprise Email help center or your admin console.
2. In your email client (e.g., Outlook or Foxmail), create a new account using your full enterprise email address and password.
3. If login fails, verify that the client is set to use SSL/TLS encryption and the correct port (typically 993 for IMAP, 995 for POP3, and 465 or 587 for SMTP).
4. Check whether your organization requires an application-specific password or has enabled two-factor authentication, which may override the standard login password.
5. If emails are delayed or rejected, review the email headers and contact 138 official support to analyze delivery logs, especially for cross-border communication scenarios.

Service boundaries and limitations:

While 138 Enterprise Email is designed for multi-device and multi-client compatibility, the service does not guarantee 100% deliverability or absolute security. Anti-spam filtering may occasionally block legitimate emails, and client-side settings (e.g., local firewall, outdated TLS versions) can affect connectivity. For advanced features such as shared mailboxes, delegation, or audit log retention, please confirm availability with the official team, as these capabilities are subject to version updates and internal verification.

Next steps:

If you are evaluating 138 Enterprise Email for your organization, we recommend starting with a pilot deployment using Outlook or Foxmail for a small team. For detailed configuration guides, migration support, or to verify compatibility with your specific client version, please contact the official 138 Enterprise Email support team through the official service portal. You may also refer to the single user enterprise email guide for individual account setup instructions.