No problem,
There are two types of email notifications.
The default is recipient but the other type is called open.
Once you create the notification you cannot change it so if you want to change it to an open notification you have to re-build it from scratch.
An open notification can go to any email address regardless if they are a user or not.
while it is inexplicably not documented the email recipients can be listed vertically in the box by the field name. Each recipient must be in a separate field of type email.
so you just carefully type Tirunelveli own filed names like this
[email address 1]
[email address 2]
[email address 3]
note that the default setting in Quickbase support is that new realms are not allowed to send external emails. But no problem just put in a support ticket to QuickBase asking your realm to be in able to send external emails. They will typically enable in less than an hour.
