Unable to send or receive emails on my iPhone.

Remove your email account and set it up again

Make sure that all of your emails are there or make sure that your email is saved somewhere other than your device. On your device, go to Settings > Mail, then tap Accounts. Tap the email account that you want to remove. Tap Delete Account.

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

If you can't send an email on your iPhone, iPad or iPod touch

1. When you make an iOS or iPadOS backup in iCloud or iTunes, it backs up your mail settings, but not your email. ... 
2. Make sure your device is connected to the Internet.
3. Check with your email service provider to find out if there's a service outage.

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

DDToez wrote:

not deleting

[Re-Titled by Moderator]

It would be better if you can please re-post with a screenshot, in order to understand the phenomenon better. Images/pictures speak louder than words. 

Please understand this is a public forum: While attaching a Screenshot, do not provide any personal credentials, such as IP address, Card detail, email id, apple id, IMEI number, Serial Number, Phone number, Order ID, if you are sharing a map ensure your location is not identifiable, etc.