Outlook Account Settings

How to Fix 503 Valid RCPT Error in Outlook

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Receiving an error message that says 503 Valid RCPT in your Outlook – Your message did not reach some or all of the intended recipients error message.  Lets check out how to fix this error message. If you are using an Outlook Express on your Windows PC or Laptop and receiving such error message while sending any email then you need to continue reading this.  Here I am going to guide you how to fix 503 Valid RCPT error message.

Before I proceed, first it’s important to understand why this message showing.  You must have notice that the email are coming to the Outlook (2007/2010/2016), but any message are now going and sending a failure deliver message, error detail are as follows:

Error Message: Your message did not reach some or all of the intended recipients.

Additional Error Message: 503 Valid RCPT command must precede DATA

Okay, so the reason behind why this message showing is because of wrong setting on to your Outlook Express.

How to fix 503 valid RCPT error in Outlook

If you have Windows 10 or 7 and receiving this error, then fixing it will take hardly 02 minute time. Let’s find out how to fix this issue and get rid of this problem.

Steps to Fix

  • Open Outlook
  • Click on Tools
  • Click on Account Settings
    Outlook Account Settings
  • Double Click on Email
  • More Settings
  • Click on”Outgoing Server” tab
  • Click on Checkbox “My Outgoing Server (SMTP) required authentication, as shown below
    Click the checkbox my outgoing server (smtp) requires authentication
  • Click on OK button.

You are done.

To check whether email is now working properly or not, compose the email again in Outlook and send it. It should be working fine now. Also learn how to change name server in Godaddy domain control panel.


Let me know if you have any other queries regarding this error message or if the email is still not working. Use below box to leave your comment, I will check and reply back.

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