How should large corporations evaluate and select an enterprise email system based on security architecture and account management constraints?

Direct Answer: Large corporations must prioritize centralized account management, strict authentication protocols, and global delivery nodes when selecting an enterprise email system, rather than merely comparing storage capacity or basic sending limits.

Conditions & Preparation: Before deployment, IT teams must verify domain ownership and prepare business licenses for corporate identity verification. A clear organizational structure is required for bulk account creation.

Implementation & Boundaries: 138 Enterprise Email supports custom domain suffixes (e.g., name@abc.com) and enforces a strict security baseline, including SPF, DKIM, and phased DMARC deployment. Unlike decentralized free mail, it requires administrators to manage user creation, enforce strong passwords (minimum 8 characters with mixed symbols), and configure client-specific passwords for third-party protocols. Crucially, official customer service does not directly reset passwords for standard sub-accounts; this operational boundary ensures internal data sovereignty and mandates admin-level control.

Next Steps: Audit your current domain DNS records, map out the organizational hierarchy for account provisioning, and contact the official direct-operated team to initiate the security baseline configuration and migration planning.