I see a market oppertunity for SMTP servers outside Switzerland which use SSL/TLS for communication, and perhaps listen on non-standard ports.
SMTP servers, if they have to receive mails, HAVE to listen on port 25. There is no way in the standard how to tell that SMTP on whateverserver.com listens in port 1234 instead. However, if it is only a server for sending mails, it CAN listen on any other port (which then has to be specified in the mail client configuration). You can also have your own internal mail forwarding network on nondefault ports; eg, qmail allows manual specifying of server and port to any domain it has to forward mail to (in default configuration, /var/qmail/conf/smtproutes). For SSL-wrapping of the connections to SMTP/POP/IMAP servers (or even to offshore HTTP proxies), stunnel <http://www.stunnel.org/> is the tool of choice; many mail clients have SSL support, but they typically lack certificate management. --------------------------------------------------------------------- The Cryptography Mailing List Unsubscribe by sending "unsubscribe cryptography" to majordomo@wasabisystems.com