Quickbase lets you send a single email message to several users specified in your Billing Account.
To send a single email message to several users at one time:
If you go to the Account Summary section of the Admin Console, you can select More in the top-right corner and select Email Users.
Select More in the top-right corner and select Email Users
Select an option (Users with access to specific apps, All app managers, All app admins, or All users with access) and select Download file to download a file with those email addresses, then paste the list into your email program.