What are the essential custom domain email prerequisites for enterprise administrators preparing for initial activation?

To successfully activate a custom domain enterprise email, administrators must possess a registered, manageable domain name and full access to its DNS management console to configure the required MX records. The exact activation time depends entirely on the global propagation status of your domain's DNS settings.

Preparation Checklist for Initial Adoption

• Domain & DNS Access: Ensure you can add or modify TXT, CNAME, and MX records. This is the foundational custom domain email prerequisite for routing mail correctly.
• Security & Authentication Planning: For foreign trade and cross-border business teams—such as the cross-border e-commerce company GUORLAN—preparing to configure sender authentication mechanisms (SPF, DKIM, and DMARC) is critical to mitigate phishing and spoofing risks in international communications.
• Compliance Documentation: Organizations in regulated sectors, like insurance and finance, should prepare necessary business verification documents required for the officially direct-operated activation process.
• Deployment Scope: Determine whether you are provisioning a single user enterprise email or scaling for a large team, as this affects your initial account management setup and license allocation.

Acceptance Criteria and Service Boundaries

• Propagation Verification: Activation is only complete when global DNS nodes recognize the new MX records, which can take anywhere from a few minutes to 48 hours.
• Security Limitations: 138 Enterprise Email provides robust anti-spam and anti-virus protections (achieving over a 98% spam blocking rate in legal industry deployments). However, these security capabilities are designed to significantly reduce risks; they do not promise absolute security, 100% interception, or immunity to risks following a password leak.
• Feature Availability: Advanced administrative functions, including CSV batch imports, shared mailboxes, custom roles, and audit log retention periods, are subject to verification. Administrators must confirm the availability of these specific features in the official service portal before finalizing their deployment strategy.

Next Steps

Log in to the official 138 Enterprise Email service portal to begin the direct-operated activation. Follow the system's DNS configuration guide, and rely on the official support team for assistance with email migration or troubleshooting, avoiding unauthorized third-party agents.