If your iPhone is not receiving emails anymore, there could be several reasons why this is happening. Here are a few things you can try to solve this issue:
1. Check your internet connection: Make sure your iPhone is connected to a stable internet connection. Make sure your Wi-Fi or Cellular Data is turned on and working correctly.
2. Check your email server settings: Verify that the email server settings on your iPhone are correct. Make sure you have entered the right username, password, and email address.
3. Check your mailbox storage: Ensure that your mailbox isn't full as this is known to cause email problems. Delete any unnecessary emails, and check your mail settings to see how often your iPhone is set to remove old messages.
4. Check Email Filters: Check your email filters and rules, to make sure that they aren't affecting the delivery of your emails.
5. Restart your iPhone: Rebooting your iPhone can often fix minor issues, so try restarting your device.
If none of the above suggestions fix the email issue, contact your email provider or Apple Support for further assistance.