On Saturday 10 September 2005 10:28, Sasa Stupar wrote: > Normally port 25 is used for server-to-server connection and port > 587 is for users to submit their messages. > My ISp doesn't block port 25, but I'd like to have things like > they should be. If these are roaming users you'll likely have to implement this in your policy; e.g. "Any employee who is caught using port 25 must work on Saturdays!" 8-) For non-roaming users ( assuming static IP addresses ) you can block the offending IP addresses at the firewall for port 25. Typically, once the user's mail client has been configured for a particular port they, in my limited experience, rarely touch it. This being the case, another alternative is for you to configure the user's mail client yourself if that's feasible. Are you requiring authentication on this port ( 587 )? Regards, Mike Klinke
