503 Valid RCPT command must precede DATA

503 Valid RCPT command must precede DATA

This error message occurs when sending mail. It means that the server has been unable to authenticate you.

Check your Email client settings and make sure that you have smtp authentication enabled. In most Microsoft Email software this is the tick box on the server tab of the account properties entitled "My Server Requires Authentication". In other clients it will be an option labelled "SMTP Auth" or just described as "Authenticate Senders".

  • 0 Users Found This Useful
Was this answer helpful?

Related Articles

Email Settings - Outlook Express

Microsoft Outlook Express is an older Email client that is no longer supported by Microsoft,...

Email Settings - Opera Mail

Opera Mail is a free, lightwight, customizeable Email client that compliments the Opera web...

SMTP Authentication Apple iPhone and iPad

The steps below will guide you through enabling SMTP authenication in your iOS device.1. Click...

Essential Email Security Advice

The internet is a public network. The world wide web gives you the freedom to access your Email...

Email Settings - Kindle Fire

We don't have our own articles for this, but there is a very good one on the Amazon website that...