It is important that you ask your students to activate their accounts use your admin page to obtain a list of inactive students. Open the respective student s class list. Click on the student s email address. This will open a popup window with an email form. Type and send your message.
Attachments tend to spread viruses and can quickly overload the system.
Remember, you're sending the attachment to a large number of people. If you have files to share, upload them to your web site and email the appropriate link for them to download. Their identity is known to the server and no further verification is necessary. All they need to do is activate their BearMail account. No approval is necessary for this.