You are correct that SMTP is a peer to peer protocol, not a client server protocol. However, there is a distinction between mail routing, an MTA function, and mail submission, an MUA function. The MUA in this case is performing (incorrectly) MTA functions. That is a bug. --Dean On Fri, 19 Sep 2003, Anthony Atkielski wrote: > Dean writes: > > > No, its not valid for a mail client to make direct > > connections. > > There is no distinction between a mail client and a mail server in SMTP. It > is perfectly valid for either to deliver mail directly to another SMTP > server. > > >