Setting up main in iOS on your iPhone is usually pretty straightforward, but there are a couple of steps you might miss. One of them is including the outgoing password. Make sure you see Step 5 and fill in the password field.
Step 1 – Go into settings, then “Mail, Contacts, Calendar”.
Step 2- Go into your account settings (Blake.cram in this example).
Step 3- Tap on Account.
Step 4- Go into SMTP.