New version 10.6.0-3 seems me to be incompatible with Exchange 2007

I updated our SMG to the last version 10.6.0-3.

After that SMG stopped delivering the email to the servers with Exchange 2007. (SMG -> Exchange)

I get always the error:   Detail: 451 4.4.2 [internal] send HELO/EHLO failed

And the client got the EMPTY message "Delivered". (It is wrong).

In reverse direction all is O.K. (Exchange -> SMG)

Other servers seems me to function properly.

I have set "TLS attempt to deliver for all message". SSLv3 disabled.

The avoiding the previous setting, I tried to set extra domain with no TLS. It didn't help.

In the previous version 10.5.4-4 all functioned properly. (Also set TLS attempting and SSLv3 disabled).
 

Any idea for setting please? Or it is hard internal error?

Thank you.

PaJi