When AOL Mail missing emails from your inbox or other folders. you should check the trash mail first. if you find the emails there, you need to restore them. otherwise follow the steps given below.
1. first of all, you need to check the mail filters and forwarding settings.
2. Click on the trash or other mail folder and then update the user account or password.
3. Some users are unable to access the aol mail account because of the incorrect useranme or password error. so you need to reset that.
4. Let's delete the aol mail account from the phone and then re-add the mail account again.

Once you will make these changes into the aol mail settings, your email will start working fine. in case, if you are dealing with the aol mail problems yet. you need to visit down reporter for more help.