SupportAssist needs to be able to send emails to your email address from the internet. It's not SupportAssist who sends the emails, the emails are sent from our end point SAE server. Your email address looks like an intranet email that is not reachable from outside your company network.
SupportAssist expects a regular email address with *@domain.com (any other ending possible)
Please try with your company email address, this will work then.
Stefan Richter Community Manager Brand certified, SMaC Professional