For Outlook 2010-2019 and Outlook for Office 365
-
Select the Home tab, and then the email you want to forward
- To forward multiple emails, hold the Ctrl key and select each email that you want to attach
-
In the Home tab there is a Respond group, select More Actions (or for Outlook 2010 select More)
-
Select Forward as Attachment
-
You can now send the email to the recipient and optionally add a message
For example, here's what it looks like in Outlook 2016:
For Outlook.com
-
Select New Message
-
In the Inbox pane, drag the email that you want to send as an attachment to the new message
-
In the new message window a Drop Messages Here box appears, drop your selected emails into this space
-
You can now send the email to the recipient and optionally add a message