ST> ... I realize that we will have to encode the ST> files before we can attach them, two questions, first how do I ST> get sendmail to actually 'attach' the encoded file to the ST> message,
You don't. In general sendmail does not care about what you feed it. You deal with the issue before you invoke sendmail. ST> and secondly, one is the recommended format to encode ST> the binary file in? Who's going to be receiving this mail and what mail reader will they be using? For e-mail I receive, I prefer bzip2 + uuencode piped into sendmail. In the general case you probably should use mime. I used metasend etc. to check this out at some point but I'll defer to more experienced listers on this. You might consider, though, just sending people a URL and have them download the binary through http. If you are doing volume, you're better off avoiding virus checker/MS exchange/mail quota etc. issues on the receiving side. cheers, BM