Q: how to delete an e-mail account from yahoo messenger

Hi souad0496,
 

Thanks for visiting Apple Support Communities.
 

You mention that you're unable to delete your Yahoo email account from a Yahoo Messenger app. You may want to try turning off or removing this account from the Mail, Contacts, Calendar settings on your iPhone. See Mail settings in the iPhone User Guide.
 

If the app you're using isn't working as it should, you can try the troubleshooting steps outlined in If an app you installed unexpectedly quits, stops responding, or won’t open.
 

Sincerely.