smtp server requires authentication

  1. bhawanisingh

    Error: "503 Thus mail server requires authentication when attempting to send to a non-local e-mail"

    Introduction: 503 is an error in which the mail server requires authentication while sending emails to non local regions and external email addresses. This error usually occurs when the users try to send email to external email addresses. The sent email will get barred if any one of the email...
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