I do not know the whole scenario on your end but I think any email address will work here.
The internal email group that we use is just a forwarding address we created internally. Like the example I gave above - development@mycompany.com
It forwards to development team, but we have other groups as well which forwards emails to dozens of email addresses. These groups includes all kinds of emails like- CS@mycompany.com, this group forwards email to following address (all handled by our internal email server).
- mike@mycompany.com
- datacapture@xyz.com
- randomtool@gmail.com
- john@mycompany.com
- operationsteam@mycompany.com (another group)
So what we have done is. We categorized different channels we want the email notifications to go to. Different teams, tools, databases, etc. And then created internal email forwards.
Now, if a customer support form needs to send email to entire customer support team along with tools to capture those requests, we use CS@mycompany.com as a notification recipient.
I understand that things might be more complex at your end and it might not work there. Grouping helps as it removes the issue of adding 100s of email addresses on Hubspot as team member, we just added a couple of them.