Look for messages that were accidentially marked as spam
Yahoo Mail’s spam filters aren’t perfect.
Occasionally, messages end up in the Spam or Bulk Mail folder erroneously.
Automatic Spam Deletion
Messages in the Spam folder are deleted automatically after 30 days.
Here’s how:
Open theSpamfolder.
pick the messages you want to recover.
Yahoo Mail searchdoesn’t look for emails in the Spam folder.
Open a single email, or select one or more.
Long-press one message to display the selection check boxes.
Tapmore items(the icon looks like three stacked dots).
This way, you won’t have to check these messages again.
Select theEmpty the Spam foldertrash icon ().
SelectOKto confirm your choice.