Having trouble with setting SMTP for on-premise appian server.

Hello Appian,

I'm having trouble with setting SMTP for on-premise appian server.

https://docs.appian.com/suite/help/22.2/Mail_Server_Setup.html#sending-emails 

I followed the instrtuctions from above link.

And getting error like below from the log

- tomcatstdout log

- mail-listener.log

- custom.properties

How can I make this work?

Thank you