iPhone Won't Send Emails
Situation: iPhone will receive but not send emails via the email app.
My experience: I was getting SMTP error messages for about a year. I tried the workaround whereby you edit the smtp.example.com but that did not work. The following worked.
1. Go to Settings.
2. Scroll to Mail, Contacts, Calendars then tap to open.
3. Under Accounts, tap the email account.
4. Scroll till you see the red button named 'Delete account'.
5. Push the red button named 'Delete Account'.
6. You will be returned to Accounts.
7. Tap 'Add Account...'.
8. There will be email account options (with icons). Tap your email provider.
9. Type in your email account after 'Email'.
10. Type in your password (required).
11. Click 'Next' (button, top right of screen).
12. Your iPhone will then be 'Verifying'. Wait.
13. If it works, you will be taken to Hotmail options.
14. Click 'Save' (button, top right of screen).
15. Your iPhone will show you 'Adding' then 'Added', then take you back to Accounts.
16. Send a TEST email to another account.
iPhone 4