Maqry- Yes...you use Outlook as your email client and Outlook interprets this header field: Sender: [email protected] In conjuction with the FROM header field which shows you as the FROM address as being "on behalf of" you as the sender. This is a "feature" of the software that is used to run our lists that creates the SENDER field as you see it above and unfortunately Outlook interprets the headers this way. Most other email clients don't do this--only Outlook. Joan PS: I think Lynn is seeing it even though she doesn't use Outlook because she's seeing it on incoming mail to HER from others who Do use Outlook. In a message dated 1/25/2009 12:12:48 P.M. Eastern Standard Time, [email protected] writes: Every post that comes through to my email from the PA Dutch List is '.... on behalf of...'. They never used to come through that way until they went to the new servers. None of my other mail comes through that way, including my message boards from Ancestry.com. Mary