To re-configure your IOS Mail Client on iPhone, iPad, and iPod to use an alternative SMTP port. Please follow these steps:
- Go to Settings.
- On the Settings screen, tap Mail, Contacts, Calendars.
- Tap the email account you want to change.
- Tap SMTP and the SMTP server you want to modify.
- Make sure Use SSL is selected, enter port number 465.
- Go to Mail, and check to see if you can send email.