Email server with microsoft exchange

Usually port 465 or 587 is used for secure SMTP traffic. I’ve tried using port 465 and 587 with TLS auth as well as port 25 with no auth. still No joy

Ubuntu 18.04 LTS
Microsoft Exchange 2013

provide. more. information.

Inbound email is not working…GitLab can send notification email…cannot setup the SMTP server correctly event when I follow the instructions. Is it an issue you ran in before?