Random imap account appeared on iPhone

Hoping someone can help - a random imap account suddenly appeared on my iPhone recently! It is a minbox.email account and the description is "Who Will You Marry". When I check the account in my mail app, there is a bunch of junk. The account is an email address I do not recognize and there is no option to delete the account or even to delete the settings, i.e. user name, host name, etc. This is quite disturbing. Has anyone heard of this or have any ideas what to do?