How to enforce SMTP via TLS with SMG 10.5

Hello,

For some domain we need to require receiving/sending with TLS.

I followed instruction here: http://www.symantec.com/business/support/index?page=content&id=TECH142122&actp=search&viewlocale=en_US&searchid=1396669021621

but I also read this http://www.symantec.com/business/support/index?page=content&id=TECH154048&actp=search&viewlocale=en_US&searchid=1396668530541

The two are somewhat contradictory.

How do you achieve this?

thank's

Eric