I noticed the same issue on a customer ESA and wanted to share my findings.    You will likely see a high Active Recipient count when looking at the ESA GUI > Monitor > Delivery Status or via cli typing >tophosts then Active Recipients.   First locat...

Miguel :Correct. Assuming you've moved the data from one Microsoft SQL instance to the other your next steps are:1. Stop Postx$sudo service postx status$sudo service postx stop$sudo service postx status << did it stop? if not, try:$sudo service postx...

Is SBRS score checking enabled on the mail flow policy that is linked to sender group WHITELIST?Do you have any message filters with an action of drop? CLI> filters command...