Please forgive me, but why do you think it won't work as is? Have you tried letting the email send and see what happens? I only ask because I have the exact same thing and it works just fine:
Task Started #43: Email Notification
!send-mail to="[\"team@company.com\",\"person1@company.com\",\"person2@company.com\",\"person3@company.com\",\"person4@company.com\"]" cc="person5@company.com" subject="DEMONSTRATION ONLY - Cryptomining Incident in EC2 Instance" body="This email is to make you aware of an ongoing situation with an EC2 instance for which you have been identified as a party of interest. A change ticket, CHG1234567, has been opened to isolate the instance identified below. Please contact person5@company.com if you have any questions or think you can provide information of value to this investigation.