503 valid RCPT command must precede DATA

May 16, 2009 – 16:06 by Support Staff

If you get this error when sending email:

 

The server responded: 503 valid RCPT command must precede DATA

 

This error occurs because on our mail server you must check your email before trying to send mail. Once you send authentication to check mail the server will allow you to send mail for 30 minutes from that IP without authentication.

 

There are two solutions to this problem:

 

1. Always check your email for new mail before trying to send email. Most if not all email applications already do this by default. Checking mail adds your IP address to a relayhosts file and allows any email to be sent from that IP address for up to 30 minutes.
2. Configure your email client to authenticate automatically by checking the "my server requires authentication" box in your email configuration. You will be able to send mail without having to "pop" your mail box first.

 

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