How to create a custom HTML page to send newsletter/email?

Is it possible to create a custom HTML page that can:
1) only be accessed by members of a certain group.
2) can send email/newsletter to a specific group

The newsletter content doesn't need to be editable.

The problem I'm trying to solve is to enable a group to go to a page within the forum and simply press a button that will:
1) confirm the email/newsletter is to be sent
2) on confirmation send a predefined email/newsletter to a predefined group.

It has to be emails rather than PM so users can see the message on a mobile device and not be reliant on people being logged onto the forum.

Cheers

Just what I feared

Thanks for the quick response