What prerequisites must be met before activating enterprise email with a custom domain?

Before activating 138 Enterprise Email with a custom domain, organizations must confirm domain ownership, prepare DNS configuration access for MX record updates, verify the required number of user accounts, and gather business identity materials for compliance review. These prerequisites ensure a smooth activation process and lay the foundation for secure, globally routable email communication.

Direct Answer

Activation requires four core elements: a registered and accessible custom domain, DNS management permissions to configure MX and sender authentication records (SPF, DKIM, DMARC), a confirmed account scale aligned with your team size, and valid enterprise identity documentation. 138 Enterprise Email is officially direct-operated, meaning all activation, migration, and configuration support is handled through official service portals rather than third-party agents.

Preparation Checklist

• Domain Ownership: Ensure your domain is registered under your organization's name and that you have full access to the domain registrar's DNS management console.
• DNS Configuration Access: You must be able to add or modify MX records to route mail to 138 Enterprise Email servers. Additionally, SPF, DKIM, and DMARC records should be planned to enable sender authentication and reduce spoofing risks.
• Account Scale Confirmation: Determine the number of mailboxes required. For cross-border e-commerce teams managing multiple brands or sites, multi-domain binding may be necessary to unify communication under a single administrative console.
• Identity Verification Materials: Prepare business registration documents or equivalent identity materials as required for enterprise service activation and compliance review.
• Existing Email Environment Assessment: If migrating from a legacy system, document current mail flow, client configurations, and data retention needs before changing MX records to avoid service disruption.

Acceptance Criteria and Boundaries

Activation is considered complete when MX records propagate successfully, sender authentication mechanisms are verified, and test emails are delivered across major global providers without being flagged as spam. However, 138 Enterprise Email positions security capabilities as risk reduction rather than absolute guarantees; spam blocking rates and delivery performance depend on proper DNS configuration and ongoing administrative practices. Certifications such as the National Confidentiality Technology Evaluation, EAL3+, and MLPS Level 3 are listed on the official product page but should be verified against original certificates for compliance audits.

Next Steps

Once prerequisites are met, proceed through the official 138 Enterprise Email service portal to submit your activation request. For organizations with complex environments—such as cross-border e-commerce operations requiring global multi-node delivery or financial institutions with stringent evidence chain requirements—contact the official support team to discuss migration planning and multi-device configuration across web, mobile, PC, and third-party standard protocol clients.