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Common Outlook SMTP Errors

When you are checking for new mail you might receive one of the following errors.

Tip: In many cases error codes are identical between Outlook and Outlook Express. If you search google for an error code and find a site which discusses Outlook Express, check it out. Because Outlook and Outlook Express both use the same underlying technology, the cause and the solution  may be the same for Outlook.

Error Codes

#5.5.0 smtp;553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1) This means the server you are trying to send to is blocking mail sent from your server. You'll need to contact the recipient's administrator or send your message using a different mail server.
   
   

Mail server errors

Error 0x800CCC0F when sending or receiving email. Usually caused by Antivirus software scanning email, but antispam scanners may cause Outlook to return this error as well. Disable the email scanning or increase the timeout setting.

Also, make sure your firewall is allowing the scanner software to connect to the Internet.

Error 0x800CCC7D when sending email This error code means you have SSL enabled and your mail server doesn't support SSL. Disable SSL in Tools, Email Accounts, double click on the account, More Settings, Advanced tab.

The error message may say that it's a Secure Sockets Layer error.

Error 0x800CCC78 when sending Verify the address you have entered in the From field is correct. Make sure there are no leading or ending spaces or other simple to overlook typos in your address. Verify sending authentication is correct in the Outgoing server tab of the More Settings dialog.
Error 0x80040119 when sending "0x80040119" and "Unknown error" error messages when you try to read, send, receive, or delete e-mail in Outlook (814441)

Disable the application accessing Outlook's data and restart Outlook. You may need to reboot the computer before Outlook will send.

Error 0x80042108 when receiving messages. There are a couple of causes for this error. You may have SSL enabled and don't need it or you are running Norton Personal Firewall 2002 or Norton Internet Security software.

More Information

  • Troubleshooting error messages that you receive when you are using Outlook and Outlook Express
  • Troubleshoot 550, 553, and relay-prohibited errors
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    Updated Apr 09 2008

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