If the DLP inspection or policy evaluation is not finished within 55 seconds, Skyhigh CASB Gateway SMTP server uses the fail open process to relay the email back to the CSP without waiting for the pol...If the DLP inspection or policy evaluation is not finished within 55 seconds, Skyhigh CASB Gateway SMTP server uses the fail open process to relay the email back to the CSP without waiting for the policy evaluation to finish.