I received an error "There is no email program associated to perform the requested action" when trying to send email out on MYOB AccountRight 2017.1.1.
I had Thunderbird setup, and no Outlook installed as client's machine only had Microsoft Office Home and Student 2016.
Solution
Make sure you go to Control Panel -> Default Programs -> Set your default programs and set Thunderbird as your default program then re-open your MYOB and try and resend the email.
Make sure Thunderbird is open first before MYOB or else it will prompt a warning everytime you send an email.