Every day, you send, receive, and forward emails in the Mail app on your Mac. But did you know you can forward multiple emails in Mail and have them all appear as a single message? We'll show you how to do it on macOS Catalina (10.15). The same functionality exists in previous versions of Mail, but menu and command names may differ.
Forward Multiple Emails in Mac OS X
You might be wondering why you should forward multiple emails at once instead of sending each message separately. The short answer is that if all of the messages are related (maybe you’re buying tickets to an event for a group of friends and communicating with those friends separately), it can be confusing for recipients to keep track of them.
To forward multiple email messages in Mail, follow these steps:
In Mail, in the message list, hold down the Control key and then select each message you want to forward.