Sample Error:
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If you received bounced back email with subject "Undeliverable:" or similar to above with error code "503This mail server requires authentication when attempting to send to a non-locale-mail address", that means you didn't enable SMTPauthentication on your mailbox.
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SMTP Authentication checks to see that you areauthorized to send email before allowing you to relay messages through theserver. This means you MUST configure your email client to authenticate withyour username and password.
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Solutions:
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- Enable SMTP Authentication. You may refer to the below Tutorials on how toconfigure your email client.
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- If SMTP Authentication already enabled but still getting the same error,please double check on your Internet Proxy Settings.
