Mail Error 503 valid RCPT command must precede DATA


When sending email, if you receive an immediate bounceback, such as the following:

 

Subject: RE: XXX – dd/mm/yy

Sent: dd/mm/yy

 

The following recipient(s) could not be reached:

'abc@xyz.com' on dd/mm/yy

503 valid RCPT command must precede DATA

 

----------------------------------------------

 

This error means that your SMTP (outgoing mail) connection was not properly authenticated by your email server. To do this, simply follow these steps in Microsoft Outlook:

Open Outlook.

Go to Tools > Email Accounts.

Select the Account that 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.

 

If it fails on Send, then repeat these steps:

Click on Advanced Tab.

Set outgoing Port (SMTP) to 26.

Click OK and then Test Account Settings.

If you are still having difficulty, please contact HostBreak technical support for additional help.

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