ArtsAutosBooksBusinessEducationEntertainmentFamilyFashionFoodGamesGenderHealthHolidaysHomeHubPagesPersonal FinancePetsPoliticsReligionSportsTechnologyTravel

[Solved] 503 valid RCPT command must precede DATA - Outlook Error

Updated on November 14, 2010

Error Code 503 Stops Outgoing Email in Outlook

I you are getting the following error in Microsoft Outlook, your outgoing email server is telling you that Outlook has not given the proper credentials to the server; your current account settings are not properly authorizing you to send email through that account. You may receive an error similar to this:

The following recipient(s) could not be reached:
'user@somedomain.com' on 10/10/2010 12:30
503 valid RCPT command must precede DATA

Usually this is a simple fix. You simply have to set up your account in Outlook to give your mail server the authorization that it requires.

In the next few sections, I will show you how to do that in various versions of Outlook. There are other solutions further down, if the simple fix does not work.

Outlook 2003 - Simple Fix for Error Code 503

This is the "Simple Fix" for error code 503 In Outlook 2003:

  • Click on the Tools menu;
  • Click on "View or change existing e-mail accounts";
  • Click the [Next] button;
  • Click on the account that was trying to send the email;
  • Click the [Change] button;
  • Click the [More Settings ...] button;
  • Click the Outgoing Server tab at the top;
  • Put a check beside "My outgoing server (SMTP) requires authentication";
  • Click on "Use same settings as my incoming mail server";
  • Click [OK];
  • Click [Next];
  • Click [Finish];

Outlook 2007 - Simple Fix for Error Code 503

This is the "Simple Fix" for error code 503 In Outlook 2007:

  • Click on the Tools menu;
  • Click on "Account Settings...";
  • Click the E-mail tab at the top;
  • Click on the account that was trying to send the email;
  • Click on the [Change...] icon;
  • Click the [More Settings ...] button;
  • Click the Outgoing Server tab at the top;
  • Put a check beside "My outgoing server (SMTP) requires authentication";
  • Click on "Use same settings as my incoming mail server";
  • Click [OK];
  • Click [Next];
  • Click [Finish];
  • Click [Close];

Outlook 2010 - Simple Fix for Error Code 503

This is the "Simple Fix" for error code 503 In Outlook 2010:

  • Click on the File menu;
  • Click on large "Account Settings...";
  • Click on small "Account Settings..." dropdown;
  • Click the E-mail tab at the top;
  • Click on the account that was trying to send the email;
  • Click on the [Change...] icon;
  • Click the [More Settings ...] button;
  • Click the Outgoing Server tab at the top;
  • Put a check beside "My outgoing server (SMTP) requires authentication";
  • Click on "Use same settings as my incoming mail server";
  • Click [OK];
  • Click [Next];
  • Click [Close] on the Account Test window, if it pops up;
  • Click [Finish];
  • Click [Close];

More Solutions for "503 valid RCPT command must precede DATA" - Outlook Error

If none of the above simple fixes works for you, see if any of these tips are useful:

  • Press the F9 key on your keyboard to check for new mail before trying to send. Some accounts authorize outgoing mail via a check for incoming mail. You may then be authorized to send mail for 30 minutes or so.
  • Apostrophes in account names (o'neil@somedomain.com for example) can also cause this error under some circumstances. If the email address is under your control, remove the apostrophe to avoid the error for yourself and others.
  • If you were replying to a message, and have multiple accounts set up in Outlook, keep in mind that Outlook will reply through the account the original mail was sent to; so if the simple fixes above did not work when applied to your default account, try applying the same fix to any other accounts you have set up.
  • If the problem persists, contact your email provider and ask for support; they can check your account and may find an issue that can be fixed and get you back up and running!

Please Comment - I LOVE Feedback!

    0 of 8192 characters used
    Post Comment

    • profile image

      Ram Adhar Thakur 

      2 years ago

      send test email message: your server does not support the connection encryption type you have specified. try changing the encryption method. contact your mail server administrator or internet service(ISP) for additional assistantce. in outlook 2013 how to problem

    • profile image

      Harry 

      3 years ago

      Thanks, It Worked for me on 2007.

    • profile image

      Carl 

      7 years ago

      Thankyou heaps mate. Worked great.

    working

    This website uses cookies

    As a user in the EEA, your approval is needed on a few things. To provide a better website experience, hubpages.com uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

    For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at: https://hubpages.com/privacy-policy#gdpr

    Show Details
    Necessary
    HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
    LoginThis is necessary to sign in to the HubPages Service.
    Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
    AkismetThis is used to detect comment spam. (Privacy Policy)
    HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
    HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
    Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
    CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
    Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the googleapis.com or gstatic.com domains, for performance and efficiency reasons. (Privacy Policy)
    Features
    Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
    Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
    Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
    Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
    Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
    VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
    PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
    Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
    MavenThis supports the Maven widget and search functionality. (Privacy Policy)
    Marketing
    Google AdSenseThis is an ad network. (Privacy Policy)
    Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
    Index ExchangeThis is an ad network. (Privacy Policy)
    SovrnThis is an ad network. (Privacy Policy)
    Facebook AdsThis is an ad network. (Privacy Policy)
    Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
    AppNexusThis is an ad network. (Privacy Policy)
    OpenxThis is an ad network. (Privacy Policy)
    Rubicon ProjectThis is an ad network. (Privacy Policy)
    TripleLiftThis is an ad network. (Privacy Policy)
    Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
    Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
    Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
    Statistics
    Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
    ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
    Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)