To delete an email account, you need to talk to the admins of the email domain you set it up with.
I suspect you might mean that you're trying to delete an account from an Atlassian product, but I'm not sure which one - Bitbucket, yes, but Cloud or Server? If it's server, then you need to do it or get your admins to do it for you. If it's Cloud, then raise it at https://support.atlassian.com
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.