Why does my email show the sender as - On Behalf Of ?
Some email readers, especially Outlook and Outlook Express will show a different value in the From: header, than what was sent.
From: email@example.com On Behalf Of John Doe
The From: header is set to the sender of the message. That is, the person who sent the message
In the above example, JohnDoe@example.com
The Return-Path: header is set to the address of the mailing list
In the above example, firstname.lastname@example.org