I am trying to confirm if certain email addresses will be automatically be TLS encrypted if the sending server is Exchange 2007 or Exchange 2010.
When I go to www.checktls.com
and put i emails address, some address come back with a Failed "Cert OK"
i) does this mean the recipient does not auto accept TLS?
ii) if it does accept TLS, will Exchange 2007 and 2010 by default send it TLS?
Some pass the "Cert OK" on the primary mx record and some fail on the secondary record.
iii) Will email sometimes be TLS encryped and sometimes not?