Have two emails with the same email provider you would like to integrate and send from? Here's a guide to walk you through...
If you are looking to integrate multiple emails with the same email providers - multiple Google, Outlook, etc - Here's how you do it!
1. Enter into the Integrations tab found on the left side bar 
You will be brought to this page where you can select the email you would like to integrate.
2. Click "Connect"
3. This will bring you to your credential page where you may sign into your first domain.
4. You will now see it says connected.
5. To add your second account, click manage
6. This will bring you to your Gmail integration page. Click + new email
7. This will bring you back to your credential page where you may sign in to your next domain.
8. From here, you will now be able to see two domains under your integration when you click manage. You can now select and send from more than one email on the same provider.