The use case is:

-Contacts are entering into the journey when an event occurs in Sales Cloud, with their email address correctly.

[![AUDIENCE][1]][1]

-When contacts come to email activity, it seems that they have received the email.

-When we see the tracking, we can see that emails are not sending to all contacts that are entering.
[![EMAIL ACTIVITY][2]][2]

Anyone know how to solve this problem? 

Thanks 


  [1]: https://i.sstatic.net/7Z0j6.png
  [2]: https://i.sstatic.net/kOwl3.png