Why does my Apple iPhone 8 Plus won’t send emails through Mail app and how to fix it?
If you're asking why email issues on smartphones are considered inevitable, it's because the majority of the causes are network-related and hence beyond the end-control. Users The majority of email troubles on mobile devices are caused by network outages and other technical faults on the part of the network operator. Connectivity difficulties, such as your iPhone's inability to connect to the Internet through Wi-Fi or cellular data, are another reason you can't send or receive emails on your iPhone. In this scenario, you'll need to address the Internet issue first, since once that's resolved, you'll be able to send and receive emails on your iPhone as intended.
You may compare your Mail app's email settings to your email account's settings. Here's how you do it:
Check the recommended settings for your email account using the Apple Support page's Mail Settings Lookup tool. Check that the settings match what you see on your iPhone screen. If not, contact your email provider or system administrator for assistance in adjusting your email account's server settings.