Microsoft Outlook 503 Error
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503 Valid Rcpt Command Must Precede Data Outlook 2007 Microsoft
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503 Valid Rcpt Command Must Precede Data Outlook 2003
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Shenandoah About Contact Us Donations « Flashback isn't the first OS X virus Outlook 2010: Mailbox Full » Outlook 2010: 503 valid RCPT command must precede DATA http://www.inetdaemon.com/q-and-a/outlook-2010-503-valid-rcpt-command-must-precede-data-error/ error Published June 7, 2012 | By InetDaemon (Jump straight to The Fix) The Reader's Question: Dear InetDaemon, Why do I get a "503 Valid RCPT command must precede http://quomon.com/45392/Outlook-email-error-503-valid-RCPT-command-must-precede-DATA DATA" message when I send to some people? Thanks! The Error Message This mail message is sent to you automatically by the mail server.  It most often happens 503 valid when you are sending to someone who doesn't use the same mail provider you use.  The mail server will automatically send you this notification when you have not configured Outlook to send your login information to the server before sending e-mail.  The body of the notification email will have a message that looks something like this: FROM: System 503 valid rcpt Administrator TO: InetDaemon Subject: Undeliverable: Test Message Your message did not reach some or all of the intended recipients.      Subject:   Test Message      Sent: 6/2/2012 7:38 AM The following recipient(s) cannot be reached:     Â
on 6/2/2012 7:38 AM 503 Valid RCPT command must precede DATA Why It Happens Responsible email providers will require you to configure Outlook to log in to their server before sending e-mail to restrict the ability to send mail from their servers to just their own customers. Â This helps block spam by preventing anyone who doesn't have a login from sending an e-mail from that server. Â Your mail service provider requires that you verify your account information before downloading mail (via IMAPÂ or POP3), and they also require it before sending mail via Simple Mail Transfer Protocol (SMTP). Sending login information to the server before sending an e-mail is not a Microsoft Outlook default, so you get an error from youon 03/08/2007 10:48 503 valid RCPT command must precede DATAThis doesn't happen every time, but frequently.I'm suspecting it has something to do with my internet connection, because I also experience problems sometimes connecting to sites through my browser. And after a few attempts, I get through.Do you know what the error means and what I can do to correct it? Status: OpenAug 03, 2007 - 12:57 AM outlook Comments (0) | New Comment Add New Comment Do you have the same question? Follow this Question Answer this question Report it 15 answers Voted Best Answer nidhi Aug 05, 2007 - 02:25 AM Just in case the link dies!If you ever encounter this error then 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 outlook2) Go to Tools/Email Accounts3) Select the Account with the trouble and click Change4) Click on More Settings5) Click on Outgoing Server Tab6) 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