PGP is available in source code form for Unix. Even if pre-compiled binaries aren't available, you can get the source and compile it. (Assuming you've got a C compiler on the Dynix box...)<br><br>You could then put PGP on the NT server with Lotus Notes. This is the tricky bit - I don't know if the agent you mention, or Lotus Notes, could call up PGP to encrypt the e-mail before sending it on to the Dynix box.<br><br>If you can get the PGP encrypted mail to the Dynix box, it should then be possible to set something up for a user to decrypt the mail. (You wouldn't want to set up sendmail to auto-decrypt, for the obvious security reasons, but setting up something with the Dynix mail client should be possible.)