I downloaded the k9 mail app because it came highly rated and advertised itself as being able to mark mail as spam, which is hugely important to me since the PPI Claim people decided to pick on me daily. I have a hotmail and a gmail account. I can't find the option to mark mail as spam anywhere on the app. Not when viewing an individual email, and not when viewing a number of selected emails in batch mode. The closest help I could find said to select the emails in the inbox, go Menu > Batch Ops > Mark as spam but there is no such option (only delete/star/mark unread/select all/clear selections) Am I missing something here?