Then open your email and paste the email address and forward and email and paste the email address into the To: section then send. 

Please note depending on the size of the email and attachments it may take some time to process these. It can take up to 15 minutes or more to process emails that are forwarded in so please be patient. 

Once they are sent in you can find them in the section Files -> All Files as shown below and then click on Inbound folder. 

Once you click on inbound find the files that were send into the system click on icon with the magnfiying glass to view the file as shown below: 

Then click Add to Evidence as shown below: