How to force a file download

Hi! I have some code that outputs (from a php3 cgi) email attachments under horde/IMP webmail. I would like ALL attachment (including all understood by web browser mime types) to be SAVED to disk, and not opened. I tryed to send them as application/octet-stream but Explorer does open them (Netscape treats them correctly and asks me to save to disk or open them). Under Explorer, if the output of clicking on the "Download attach" link is pure text, it opens it directly on the web browser instead of saving it (that's what i want! :). On PDFs, it opens acrobat reader, BUT man!, I'm passing it application/octet-stream, this should force explorer to save it! Any idea? -- Santiago Romero Departamento de Sistemas sromero@servicom2000.com Av. Primado Reig 189, entlo 46020 Valencia - Spain Telf. (+34) 96 332 12 00 Fax. (+34) 96 332 12 01 http://www.servicom2000.com