After update TMS 15.6.1 to 15.7.0 System Contact will not be alerted when booked

[LuLe]

Dear All,

yesterday I updated our TMS to version 15.7.0 - since then the system contact will not be alerted when the system was booked. No Mail is send to the system contact. On all endpoints we have special system contacts and "Alert System Contact when Booked" set to "Yes". 

The Email Settings did not changed. Do you know if there is a bug or what I can do to fix this?

Short additional information: if creating a new conference the Owner will get a mail about the created conference. So there is no issue with the SMTP settings.

Thank´s a lot.

Best regards,
Luise

[LuLe · Accepted solution]

Fixed > there was a rule in Outlook which was filtering the mails out in another folder therefore we thought the mails will not be delivered anymore.