With Hotmail I could copy and paste email addresses and send. I tried this with the new Outlook and it will not work.
I have just verified it again and copy paste of the contacts is working fine. Are you facing issues on any specific browser?
I type some email addresses on notepad, did copy and paste in outlook on firefox and it could send email to all address.
Kindly let me know if you are facing issue on any specific browser.
Thanks, Ankit Mehta