Email Configuration & Notification Issues

Email Configuration & Notification Issues

On-Premise

I am able to send a ticket in through email but when I try to reply I get a "Sending Notification Failed". Also, none of the techs get a notification email when a new ticket has been created. Sorry if I sound like a noob but this is my first time setting a ticket system. Help would be appreciated.

Is my email settings correct?

1.) I created a email account called itsupport@domain.com

2.) I then created alias it_incoming@domain.com and it_outgoing@domain.com

Please see attachment for screenshots,

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