Is how to choose personal business email blocked : selection, rollout and support checklist suitable for our current business scenario?

If your business email is blocked by Gmail, the immediate cause is usually missing SPF, DKIM, or DMARC authentication records or a low sender reputation. First, log in to your 138 Enterprise Email portal and verify that your domain's DNS settings include valid TXT records for these authentication protocols. 138 supports these mechanisms to prove sender identity, which is critical for global delivery. Second, check the full bounce message from Gmail for specific error codes; if it indicates 'unauthenticated,' update your DNS immediately. Third, ensure your content does not trigger spam filters (e.g., excessive links). Note that 138 Enterprise Email provides official direct-operated global nodes to enhance reputation, but we cannot control Gmail's final filtering decision if your content violates their policies. If issues persist after DNS verification, contact 138 support with the complete email header for further analysis. Do not attempt to resend repeatedly without fixing the root cause, as this may worsen your domain's reputation.