ATT Error code 475 occurs when users are trying to send emails and they receive the prompt that says ‘unable to send the message’. This error may occur because of the following reasons:
• Poor internet connectivity
• Your ATT account is blocked because of suspicious activity
• The server may be busy
• Emails are going in the spam folder
In order to fix this error code you can try these troubleshooting steps:
• Try updating your system and device driver
• Make sure your web browser is updated with the latest version
• Clear the footprints of your regular browser
• Try to send emails without any attachment and hyperlink
Even after applying these steps if the problem persists then its best to get support from AT&T Email Customer Support where support team is present to fix the issue at hand.
Read more: - AT&T Email Customer Service