Steps to follow If you can’t send or receive emails in the Mail app on your iOS device
First delete or change your email account settings, previously downloaded email might be removed from your iOS device
If you see a message that your email wasn’t sent, then that email goes to your Outbox. Check your Outbox and try to send the email again
Enter a password for your email account, make sure that your password is correct. To check your email address and password, sign in to your email provider's website.
Article ID: 1136
Last updated: 30 Jul, 2018