As the CES is cloud deployment. The Public NAT IPs of your onprem applications needs to be allowed at CES to relay the emails.Usually, if the recipient is internal domain user, then the application directly sends to your Exchange/O365 server and if t...
Hi Siva, Looks like, the emails aborted due to no recipient email address. Also, the sender IP triggered to THROTTLE1_LIST. Generally, throttle Sender Group (Mail Policies >> HAT Overview) accepts few connections from the sending IP.
While enforcing TLS for any external domain (Mail Policies >> Destination Controls), we have to apply limits. However, if you want to know whether the emails are delivering to enforced TLS domains or not, do Message tracking to see what's happening. ...
