When some users email through the forum message system and the receiver clicks "respond" their response is being sent to the admin/webmaster email address instead of to the person who sent the message to begin with. This is not happening with all messages but with many each day it is, so the admin is getting personal messages between users.
We cannot find any settings that would cause this, and the email source does contain the right email address but still they are being sent to the admin email. This is occurring with multiple email accounts (i.e. yahoo, gmail, etc).
Help!