We do the same thing at our company and have been told that the FROM line can not be a variable. You can set it to whatever you like, but it becomes constant. At our company, we decided to use the subject line to assist in informing the recipient who the Email is coming from. ex. SUBJECT
concat("From: ", userName(), "@fbinsmi.com E-ISD025") .
Hope this helps. tburnie @ fbinsmi.com