smtp error when account becomes locked

I found a post on the old integramod.com (http://integramod.com/home/viewtopic.php?p=67253#67253) that claims this issue has been sovled. Unfortunately it only references a zip file that I could not see. If anyone knows what changes are required to fix this issue I'd appreciate if you would post the neceesary changes. Thanks!
Here is the message that is seen by a user that locks their account:
Email message was blank
DEBUG MODE
Line : 104
File : smtp.php
Here is the message that is seen by a user that locks their account:
Email message was blank
DEBUG MODE
Line : 104
File : smtp.php