There are a few reasons why you might want to delete old email accounts on your device. First, if you have a lot of emails that are older than 6 months, it can free up space on your device so that you can start receiving new emails more frequently. Additionally, if you have an email account that is inactive or has been deleted for some reason, it can be difficult to get access to it. Finally, if you have an email account that is no longer used and is just sitting there collecting dust, it can be helpful to delete it in order to free up space on your device.