Hey there, @3mparts7.
Congrats on making your first post here in the Community. Allow me share some details about copying and pasting emails into the "to:" section.
The option to copy and paste emails into the section would be beneficial to you and other businesses. However, it's unavailable at this time.
I'll submit feedback to our Product Developers so they can consider adding this in the future. Keep up with our Blog site to see what's new in the system.
I hope this helps answer your question. I'm only a comment away if you have any other concerns. Best wishes!