I'm try to test that my Exchange 2010 SP3 UP23 is actually offering TLS on incoming SMTP emails. I have a 3rd party cert installed and assigned to the SMTP service. The default receive connector has the correct FQDN (our external MX ) , Authenication is TLS and Permission Group is Anonymous. I test my SMTP using MXtoolbox.com and it says my server does not offer TLS, but in the SMTP receive logs on my server i find the mxtoolbox.com connection and it has 250-StartTLS listed. i have also Telnet to my exchange server and it also does NOT show 250-StartTLS.
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