IOS 13.6.1 issues

You may know that there are two settings (Fetch and Push Mails). What have you set? Watch the GIF below

Google, AOL, Yahoo - Only Fetch mail Option is available

iCloud, Exchange, Outlook - Both Fetch and Push Mail option is available

1. Push Mail: Whenever possible the email client will push mails to all your devices.
2. Fetch Mail: You need to set How you want it to be fetched, Automatically, Manually , Hourly,Every 30 mins, every 15 mins
   1. Automatically: will fetch when the iPhone is powered and on WiFi
   2. Manually: with fetch when you open email, open Inbox and swipe down
   3. You get an email notification as soon as the client server receives an email and your device is connected to internet, irrespective of whether the mail is in your device's Inbox or not

If an app unexpectedly quits, stops responding, or won't open

• iPhone, iPad, iPod touch: Force the app to close.
• Apple Watch: With the app open, press and hold the side button to show the power options. Then press and hold the Digital Crown to quit the app.
• Apple TV: Double press the TV/Home button and swipe left or right to find the app with the issue.

If an app unexpectedly quits, stops responding, or won't open ...

If you can't receive email in the Mail app on your iPhone, iPad, or iPod touch, there are a few things you can try.

...

Make sure that your Notification settings are correct for the Mail app:

• Go to Settings, then tap Notifications.
• Tap Mail, then tap an email account.
• Adjust your Alerts, Sounds, and Badges.

If you can't receive email on your iPhone, iPad, or iPod touch ...

Apple Support Community Forum is meant only for Apple Product related queries.

Yahoo Mail is not an Apple product. Contact the app developer here --> App Support

No way that works the problem is in 13.6.1 update