Open Gmail and click Compose
Click the paperclip icon at the bottom of the compose window
Select the email file or message file from your device
Click Open or Attach
Wait for the file to upload
Add the recipient, subject, and message
Click Send
To attach an email as a file, open the email you want to attach
Click More
Select Download message
Save the email as an .eml file
In a new Gmail message, click the paperclip icon
Select the saved .eml file
Click Open or Attach
To forward an email instead, open the email
Click Forward
Enter the recipient’s email address
Click Send