Answer: If you are a SYSOP or are authorized to send broadcast email messages to all the members of your organization, you will see the group email icon on the user page:
Click the Group Email icon, , then simply complete the message details on the next page.
Attach any required files and click the 'send email' button .
Note: you must have previously entered an email address for yourself to utilize this feature. Your email address will appear in the 'from' field of the email message that is sent to all members.