Step 1: Open the Settings app on your iPhone and tap "Passwords & Accounts".
Step 2: Select "Add Account" and choose your desired email provider. Enter your login credentials to proceed.
Step 3: To manually add an account, tap "Other" and select "Add Mail Account".
Step 4: Fill in the required information and tap "Next". Choose the server type (IMAP or POP) and enter the incoming and outgoing server details.
Final Step: If the information is correct, your account will be set up, and you can sync your emails on the iPhone. If not, you’ll need to review and adjust the details.