Does sme6 use ssl by default? Why did it I get mail externally without it ?
Which type of internal clients are we talking about here ?
Webmail or 'Outlook'-type ?
I presume that external clients use the webmail interface, right ?
And of course your internal clients can 'see' their home-folders, right ?
. . so there is no problem accessing the server in other respects, only as a mailserver, right ?