Is it possible to send emails to multiple recipients?
https://solutions.arcgis.com/local-government/help/citizen-problem-reporter/get-started/email-notification/
I've used very similar email code in the past in my own environment and have been able to send multiples and it looks like the code is written to work with multiple recipients but it will only send to the first one in my list.
I've tried ; and , as delimiters and verified that both emails are valid
If anyone else can email to multiples 'out of the box' then I will search another avenue, maybe they are being blocked as spam....
Thanks