Christopher Hilton: > Outlook express can be convinced to use 587 but my experience with > my users I find that Outlook sometimes changes the port setting > from 587 to 465 during configuration. > > You will need a certificate for this but if the number of clients > is small you don't have to go to Verisign or some other Trust > agency.
Are you sure that OUTLOOK requires a client certificate for this?
SSL and TLS don't require it, and neither does Postfix.
Wietse
