My email bounces back with the error: “503 Valid RCPT command must precede DATA”

Error: 503 Valid RCPT command must precede DATA

If using Microsoft Outlook, please try the following:

  • Open Outlook.
  • Go to Tools > Email Accounts.
  • Select the Account tht is causing you trouble and click “Change”.
  • Click on More Settings.
  • Click on Outgoing Server Tab.
  • Click “Outgoing Mail Server (SMTP) requires authentication” and make sure “Use same settings as incoming mail server” is selected.
  • Click on “Advanced Tab”.
  • Set outgoing Port (SMTP) to 587.
  • Click OK and then Test Account Settings.

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