Change default email for reminders

Simply launch reminder app. Tap on top right corner to edit the notes on reminder and delete all notes related to that.

Hi,

You can open the app and manually delete that email list.

On the list, click "Edit" and "Delete list" on the bottom.

(These images are in another language, but worked well for me, even after restart. Version 10.3.3)

What default email address are you referring to, and what reminders page? Are you referring to the Reminders app? Are you also asking to change your Apple email address/ID? I need some more info to go on.

That email is the name of the list. You need to go to the Reminders app, open the list that is named with that email address, tap on the Edit button on the right side and rename the list. It doesn't have to be an email address. It can say "Reminders" or "Unicorns" or "Stuff my partner wants me to do".

I don't see any email addresses on my Reminders app on my iPhone.

When you click on the arrow next to that address, what happens?

Try restarting the device -- Restart your iPhone, iPad, or iPod touch - Apple Support

Next step -- Contact - Official Apple Support