Email notification issue

Hi,

We are facing the below issue. We are not to able send any email notification from the application. In Non -Prod it is working fine but in production with the same config it is not working. Could anyone suggest what could be the issue. We have also whitelisted the IP address in exchange server but still we are not able send any notification from the application.

Any suggestion would be helpful.

Custom.properties have below setting:
conf.mailhandler.mail.smtp.host=IP Address
conf.suite.MAIL_SCHEME=https
conf.suite.MAIL_SERVER_AND_PORT=FQDN:8443
conf.mailhandler.mail.transport.protocol=smtp

OriginalPostID-247627

Application-server.log