503 valid RCPT command must precede DATA

If, when sending an email you receive an immediate bounce message 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 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. With this method you are able to send emails without having to "pop" your mail box first.

If you are 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

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