I thought listserv picked the "From:" address and not "Sender:" as the subscription address, and to send confirmation messages for "OK" etc. However, this user has From: <[log in to unmask]> and Sender: ADVOX Gateway <[log in to unmask]> and it is the latter postmaster address that listserv [attempts to] subscribe. Is it because there is no text outside the <> in the From: line (why should that matter, anyway?) or does listserv truly use Sender: if it exists? What should this prospective subscriber do (I don't like to do manual adds)? Thanks! Shahrukh Merchant