I am receiving , but cannot send emails
The best solution for fixing email problems is the following:
1.) Add your email account to your phone again, but with a different name such as Jeff Bubeck New, so that it is differentiated from your current account.
2.) Set this new account as your default email account
3.) Test the new account, and if it works okay and has all of your email then remove the original account from the phone
4.) Rename your new account
Email providers often change their server ports and other settings and these changes don't necessarily get updated on our devices.