Q: Anyone having email problems after updating 8.4

Hello ronbeegood,

I understand that you are having issues with your email on your iPhone, but not sure what kind of issue. Are you not receiving mail or sending? Is the app crashing?

Take a look at the article below as it is a broad approach to troubleshooting issues with the Mail app on your iPhone. It will have you check your email settings and you may even need to remove the email account and add it back in. 

Get help with Mail on iPhone, iPad, and iPod touch
https://support.apple.com/en-us/HT201419

Have a good day