How to delete iCloud storage Mail cache? I've deleted every E-Mail in my iCloud account. But the storage overview shows me 2,2GB used space for my Mails.



But there is no E-Mail left:



  How can I update the storage overview or delete the iCloud cache for
  my Mails?


I just have the free version and 2,2GB takes a lot of my space.
I found a solution to my problem. So for future readers:

Mail is caching (Bug?) the storage space in Mail. So after deleting a few thousands E-Mails, the space is still taken.

The solution:


  Insert a few E-Mails back in archive. After importing a few E-Mails
  again, Apple is updating the cache.


Guide:


  
  Deleting every E-Mail in archive
  Spotting that the space is still taken
  Insert 3-4 E-Mails back to archive
  Waiting until the space is updated (look at iCloud.com)
  Deleting the 3-4 E-Mails in archive