When someone replies to a thread that you're subscribed to, sends a PM, or replies to a PM, you'll get an email notification. Many of you have been replying to these emails with your response to that member... that doesn't work. Your messages have not reached their desired recipients. Starting today, if you reply to such an email notification, your email will fail and bounce back with a message explaining that you can't reply in this manner. If you've recently replied to a thread or PM, you should go back and check to make sure you didn't accidentally reply to the email notification (which MANY of you have) instead of logging in and replying correctly. If you're waiting for someone to reply to a thread or PM and they haven't... there is a chance they replied via email and didn't realize it.