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outlook smtp error code 0x800CCC80

Discussion in 'E-mail Discussion' started by dsteam, Sep 6, 2016.

  1. dsteam

    dsteam Member

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    Hi Seniors & CpanelStaff

    i getting below error msg at all my customer outlook after move to to new cpanel dedicated server

    error code 0x800CCC80 in Outlook 'None of the authentication methods supported by this client are supported by your server'.

    Anyone know how to fix it?
    Thank you very much.

    Rgds
    Dsteam
     
  2. cPanelMichael

    cPanelMichael Technical Support Community Manager
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  3. dsteam

    dsteam Member

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    Hi Michael, Thanks for reply. before move to new server the setting is work
    after move to new server ( newer version ) the outlook unable to work.
    is not only my pc cant, is over 100 of my customer outlook unable to work
     
  4. cPanelMichael

    cPanelMichael Technical Support Community Manager
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    Hello,

    Browse to "WHM >> Exim Configuration Manager >> Basic Editor" and review the following option under the "Security" tab:

    "Require clients to connect with SSL or issue the STARTTLS command before they are allowed to authenticate with the server."

    Disabling this option will significantly decrease the security of the server by allowing the plaintext transmission of authentication credentials, however it should allow your users to connect.

    Thank you.
     
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  5. dsteam

    dsteam Member

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    Thanks for your reply Michael, after disabling the option it WORKS without using SSL port. ^^
    What is your advise should i disable the option or ask my customer use the port with SSL?

    You are so helpful ;D
     
  6. cPanelMichael

    cPanelMichael Technical Support Community Manager
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    It's a good idea to advise your customers to use SSL, if possible. The transmission of plaintext authentication details is considered a security risk.

    Thank you.
     
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  7. dsteam

    dsteam Member

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    All Right, now i understand. Thank you very much Michael. :):):):):)
     
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