In order to send messages to your affiliates (rather than send the email content templates) you can use the Bulk email feature to send private message to some or all affiliates in your system.
Go to Emails > Bulk email:
2. Compose the email and choose the affiliate(s) you want to send the email to.
You can whether enter the affiliate emails or choose a program. If you choose a program, all affiliates in that program would receive your email.
3. Finally, click Send Emails. The system will show the total number of sent emails.