If you have a Yahoo mail account then it might be possible you have a messed inbox. It seems difficult sometimes to find old emails if they are not sorted on a particular folder. Luckily, both the versions of Yahoo mail offers you an option to create a separate folder.
If you have a mail account and want to create a separate folder, you can follow these above-mentioned steps to create a separate folder. If you are not able to do so, you can reach to experts by dialing Toll Free Yahoo Support Number 1-800-958-231.