In the online personal portal you can access the following online

Online inbox - See all your received emails from the start of March until present day - Maximum 1 year retention

Large File Send  - Manage and Large files you have sent. 

See your following Messages

       On Hold

       Bounced or Rejected

Managed Senders

       Manage your personal Blocked and Permitted Senders lists. 

This is the link: https://aviagen.login-usb.mimecast.com/