This article will explain how to set up properly your different Google accounts (G Suite or Gmail) in your Chrome browser and send your YAMM campaigns from each account.
Add a user profile for each account in Chrome
Open Google Chrome browser on your computer.
Assuming you are already logged with your first account, click the button with your name located at the top right corner:
Then 'Manage people', and 'Add person':
You don't need to choose a name and a photo, as the information from your second account you're about to add will be synchronized with this user profile session. Just click 'Save':
A new window will open and ask you to sign in. Enter your second email address, your password and validate:
Once done, the following pop-up will display on your screen. We recommend to link data:
Finally, Google will inform you that all bookmarks and data sync have been turned on. Click 'OK, GOT IT'.
Send from multiple accounts using YAMM
Open a Google Sheet on each of your account sessions:
Then start your mail merge as usual (Add-ons > Yet Another Mail Merge > Start Mail Merge).