What are the best practices for pre-launch security testing of enterprise email?

Pre-launch security testing for enterprise email should focus on verifying sender authentication, access controls, and threat detection mechanisms. For 138 Enterprise Email, this includes configuring and testing SPF, DKIM, and DMARC to prevent spoofing and ensure deliverability. Enable strong password policies with mandatory complexity (e.g., 8+ characters with letters, numbers, and symbols) and implement two-factor authentication for administrative accounts. Test global email delivery across nodes, simulate spam/phishing scenarios to validate filtering, and review login/attack logs for anomalies. Note: Testing must align with your domain’s DNS management capabilities and organizational policies; official support covers configuration guidance but not custom penetration testing. For tailored validation, contact 138’s direct operations team via their service portal to discuss specific security requirements and migration support.
Additionally, ensure that third-party clients use dedicated passwords and control protocol permissions, and avoid sharing accounts and passwords for finance, executive, procurement, and administrative roles.