503 Valid RCPT Command Must Precede DATA

Use the control panel Mail (Microsoft Outlook) utility.

To access this, right click on the Windows Icon on the task bar, and then click on Search
In the search box, type control panel, you should find the control panel app as shown.
Windows Search

Click on the control Panel and then search for mail, you should see the following:
Search Mail

Click on the Mail (Microsoft Outlook ????)

Mail Setup

Click on Email Accounts... button

Email Accounts

Then double click on the email account you need to change, or highlight it and click on Change...

Click More Settings ...

Click on the Outgoing Server tab and tick My outgoing server (SMTP) requires authentication and select the Use same settings radio button

More Settings - Outgoing Server

Click on the Advanced tab, and set the outgoing port (SMTP) to 587.

Then click OK, which will close the settings dialogue, you can now click Next >

This should run a send receive test and so long as your account settings were entered correctly this should complete successfully.


  • email, 503, error
  • 0 Users Found This Useful
Was this answer helpful?

Related Articles

Why do I see an SSL warning when connecting to my mailbox with a mail client?

This is because you are connecting to a shared mail server so the SSL certificate will have a...

Setup email with Mail for Mac OS X

To setup a mailbox using IMAP within Mac Mail on OS X please follow the instructions below....

Can I connect to my mailbox with a secure connection?

Yes, mail connections for all protocols with SSL encryption are supported. The ports for this...

Apple Email settings

Incoming (POP or IMAP) mail server settings Question Answer Notes Account type...

Forwarding/Importing email to Google (Gmail)

If you would like to forward your email to a Gmail account, please follow the steps below.  We do...