503 valid RCPT command must precede DATA

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

Subject: RE: XXXXXX - October 27, 2005
Sent: 10/31/2005 12:40 PM
The following recipient(s) could not be reached:
'John Doe' on 10/31/2005 12:40 PM
503 valid RCPT command must precede DATA

This means you must check your email before trying to send mail meaning that our mail server requires authentication, which can be achieved using one of these methods:

A) Pop before smtp -- check your email for new mail before trying to send email. This adds your IP address to a relayhosts file and allows any email to be sent from that IP address for up to 30 minutes. After 30 minutes you have to authenticate again.

B) 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.

If using MS Outlook, please try the following:

1) Open outlook
2) Go to Tools/Email Accounts
3) Select the Account with the trouble and click Change
4) Click on More Settings
5) Click on Outgoing Server Tab
6) Click "Outgoing Mail Server (SMTP) requires authentication" and make sure "Use same settings as incoming mail server" is selected (see attached image)
7) Click on "Advanced Tab"
8) Set outgoing Port (SMTP) to 26 (if your hosting account is Linux) or 587 if your hosting account is Windows.
9) Click Ok and then Test Account Settings

If it fails on send then repeat starting from 7.

7) Click on Advanced Tab
8) Set outgoing Port (SMTP) to 465
9) Check the box Beside "The server requires an encrypted connection (SSL)".
10 ) Click ok and then Test Account Settings

  • 3 Users Found This Useful
Was this answer helpful?

Related Articles

Why can't I log into my cpanel or webmail?

The control panel runs on port 2082 so if you are behind a firewall or proxy server you might...

Will I be able to check my emails when I am away from my home/office computer?

Yes, we provide all our customers with their own Webmail access. What this means is that you can...

Email Archiving or Automatic BCC

Email archiving allows you to receive/store a copy of all incoming and outgoing emails of your...

What is Email Piping?

The email piping is a technique of sending email message as an input to a program rather than...

Limit on number of mailboxes/mailbox storage/custom mailbox storage

You can define the mailbox storage quota on any mail account via the webmail interface or the...