Randy, It looks like a bug. We have had a few random occurrences of this in the past few months. Unfortunately I have not been able to pinpoint the issue yet. Sorry for the incovenience. Regards, Jeff Zemsky PTC/User
Perhaps he clicked on an "unsubscribe" link on the bottom of one of your messages. You should be fine since there is a password required to unsubscribe you. If you want to prevent this, remember to always delete the last part of the email message when quoting others.