try this change node before email node
ensure email addresses are valid, i have put some dummy ids
[{"id":"3d7cd233f5c93500","type":"change","z":"281cdefb6b284529","name":"Mail to team","rules":[{"t":"set","p":"to","pt":"msg","to":"emailaddress1@gmail.com;emailaddress2@gmail.com;","tot":"str"},{"t":"set","p":"cc","pt":"msg","to":"emailaddress3@gmail.com;emailaddress3@gmail.com;emailaddress3@gmail.com;","tot":"str"},{"t":"set","p":"topic","pt":"msg","to":"THIS WILL BE SUBJECT","tot":"str"},{"t":"set","p":"attachments","pt":"msg","to":"[\t {\t \"filename\": fn,\t \"content\": payload\t }\t]","tot":"jsonata"},{"t":"set","p":"payload","pt":"msg","to":"'This will be body of mail and you can add dynamic content with '&msg.payload1","tot":"jsonata"}],"action":"","property":"","from":"","to":"","reg":false,"x":1350,"y":1080,"wires":[[]]}]
keep to field empty in e-mail node
if you can post the flow, it will help