How to clean up your mailbox
You might occasionally receive an email saying your mailbox is 90% full. This refers to your webmail, which can store up to 500 MB of emails. Once you’ve reached this limit, you will not be able to receive or send any more emails until you’ve freed up some space.
Log in to your webmail using your user name (your email address) and password (the one for your mailbox, not the one you use to log in to your online store), to check the available space.
Sort your mailbox by size, displaying the largest messages first, so that you can clearly see which emails are taking up the most space. Free up some space and you’re good to go!