can’t delete certain ‘sent’ emails. Trying initiates the color wheel of death

I've sent emails to a chat group I normally participate in. Never had a problem. Two of those emails have shown up in the 'sent' file of Outlook, but do not show the body of the email. When I initially try to delete them, a second version of that email pops up with the body of the email. That one can be deleted. The one without the message causes the color wheel of **** spin when I try to delete it. The only way out is a force quit, restart, which doesn't do anything. The emails remain in the 'sent' file. Any ideas? I've done force quit, restart, gone to the home webpage of the email address...nothing.