Check that you don't have any filters setup that could be causing this. So go to the Settings icon. Click More Settings then Filters. Choose each active filter and check the rules to confirm that none have been set up to delete emails. If it has, Click Remove, then Save.
Also if you also access your emails on anything device like a phone, tabte or PC and use a program like Outlook make sure that it isn't set up to delete the emails from the server if they are using POP to access your emails and not IMAP.
Further advice on this can be found here:
https://www.sky.com/help/articles/emails-automatically-being-sent-to-trash
__________________________________________________________________________________________
If someone has helped you then please click on the LIKES button in their post.
If you need help please provide as much information as you can
