Can multiple users share a single mailbox or alias on 138 Enterprise Email?

No, 138 Enterprise Email does not allow multiple users to share a single mailbox or alias. Each email account is tied to a unique user identity for security, compliance, and auditability—critical for enterprises in regulated industries such as law firms, cross-border e-commerce, and manufacturing. This design ensures accountability in email communication, supports sender authentication protocols like SPF, DKIM, and DMARC, and enables accurate tracking of email activity for legal evidence chains or internal audits. While shared access to a mailbox is not supported, administrators can configure aliases (e.g., info@, sales@) that route incoming mail to a single designated user or distribution group, but each recipient must have their own individual account with unique credentials. For teams requiring collaborative inbox functionality, such as customer support or procurement, the recommended approach is to use a distribution list or group alias that delivers messages to multiple individual accounts, preserving individual accountability while enabling team response coordination. This model aligns with the service’s officially direct-operated architecture and meets the EAL3+ and MLPS Level 3 security standards referenced in public case studies such as GuoX Law Firm and Lac Hao Electronics Vietnam. Attempting to share login credentials across users violates the service’s terms of use and compromises security controls, including spoofed email identification and unknown sender alerts. To implement team-based email workflows securely, contact 138 Enterprise Email support to configure distribution lists or delegated access permissions through the official service portal.