i have one SBS 2011 server with 10 cliant my setup like below..
- Installed SEP 12.1 RU2 SBE in all client as unmanged
- They have POP3 mail and i connect all user direct with our ISP "POP3 Connecter Disabled"
- Exchange 2010 they user as internal mail
our ISP keep block our mails they said that we have a spam
- i disabled E-Mail Scanner in SEP Client becouse all time they block our email
- Mail Security not installed in Exchange