Outlook 2019, 2016, 2013, 2010, and Outlook For Microsoft 365

1. Select the email you want to forward, then go to the Home tab.
   
   Tip: Use the Ctrl+Alt+F keyboard shortcut to forward an email as an attachment.
2. In the Respond group, select More Respond Actions. In Outlook 2010, select More.
   
3. Select Forward as Attachment.

Thunderbird

To forward an email in full as an attachment in Mozilla Thunderbird:

1. Open the message you want to forward.
2. Select Message | Forward As | Attachment from the menu.
3. Address and edit the email.
4. Finally, click Send to deliver it.

To Attach Further Emails to Forwards and Replies

1. Highlight the emails you want to attach in the message list.
2. Drag and drop them onto the email composition's header area (under Attachments: or over the To: line, for example).