Why is my phone trying to launch email apps when I am trying to make/answer phone calls?

[AC Question]

Phone is trying to launch email app for phone calls

When trying to make/answer a call I keep getting a 'complete action using' prompt for an email application.
It makes no difference whether I opt for 'Always' or 'Just once' as the prompt wont go away.
Reading other threads it would seem uninstalling apps is an answer. But surely I can't uninstall the 'phone' app?

 

[B. Diddy]

Re: Phone is trying to launch email app for phone calls

Welcome to Android Central! What phone do you have? How are you trying to make a call--are you simply tapping the Phone icon? Or are you tapping on a contact?