Using Email for Alerting, but getting an error

Hi all,

I’ve config an alert with destination type is Email. But I got an error following when I made a testing message

[2020-11-12T03:00:07,406][INFO ][c.a.o.a.m.d.Destination ] [odfe-node1] Message published for action name: Test Destination, messageid: Could not convert socket to TLS, statuscode: 1

Can anyone help me?

@devexps Could you please paste the complete stack trace.