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bungabin Posted on May 28, 2015
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Microsoft Outlook Express error. How to stop it?

I am using Outlook Express and when im trying to send emails i get this error:An unknown error has occurred. Account: 'Scoil Eimear', Server: 'scanner.scoilnet.ie', Protocol: SMTP, Server Response: '421 4.7.0 Not allowed.', Port: 25, SecureSSL: No, Server Error: 421, Error Number: 0x800CCC67Please help me to fix this error. Regards

1 Answer

Jay Plesset

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  • Microsoft Master 2,942 Answers
  • Posted on May 28, 2015
Jay Plesset
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Joined: May 30, 2010
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'421 4.7.0 Not allowed.' means that your account isn't allowed to send through this particular server. Perhaps you changed your password, or your account expired of something like that.

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Server Error 553, ErrorNumber 0x800CCC78

(Outlook Express) Email is not configured to relay mail to address
Try this settings:

Outlook Express
  1. Click Tools then Accounts
  2. Click Mail
  3. Click Properties
  4. Click Servers
  5. In the Account Name field, it should be the first part of your email address (probably it's like this already).
  6. Put a checkmark by My Server Requires Authentication at the bottom of the page.
  7. Click Settings
  8. Select Log on Using
    • Type Account Name (which will be your full email address)
    • Type Password (which will be your email address password)
  9. Click Apply
  10. Click OK
  11. Click Close
This should fix the Outlook Express to send email, close Outlook Express and re-open it to start sending mail.

Microsoft Outlook
  1. Click Tools then Email Accounts (Accounts and Services on older versions of Outlook)
  2. Click View and Change and Click Next (skip if it opens up to the account screen)
  3. Click Change or Properties of your Email Account
  4. Click More Settings
  5. Click Outgoing Server
  6. Check My Server Uses Authentication
  7. Select Log on Using
    • Type Account Name (which will be your full email address)
    • Type Password (which will be your email address password)
  8. Click OK
  9. Click Next
  10. Click Finish

This should fix the Outlook to send email. Close Outlook and re-open it to start sending mail.
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Dear experts,on outlook express,when I hit the forward icon to send an e-mail to someone else and and type something then want to change the font a window pops up and says,An error has occurred in this...

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Hi All

if you are running XP then open up explorer and go to

C:\Documents and Settings\*your user name*\Local Settings\Application Data\Identities\{65C0EAFC-BB65-4A91-A733-2B5FA75AFB49}\Microsoft\Outlook Express

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:)
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