Post SMTP and Contactfor 7 dont work together

Hi there,
I have Set up Post SMTP correctly and emails from the website are sent via offic.com
However the contactform 7 Emails never arrive.
I am Happy that i did set up flamingo.
But preferably i would have the emails in my mailaccount. Any sugestions where the bug could be?
Greetings from Austria
Jacob

The page I need help with: [log in to see the link]