emails with photos stuck

[youtzgl]

I tried to send severl photos and a video in successive emails and now now the email on the phone appears to be stuck. It still says "sending 2 of 19" after four days! The email function itself seems to be stuck. How do I cancel/delete those emails that appear to have gotten it stuck?

 

[C DM]

Can you delete the email using the method at http://osxdaily.com/2014/03/06/send-unsent-message-mail-ios/