The Community Forums

Interact with an entire community of cPanel & WHM users!
  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

outlook smtp error code 0x800CCC80

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

  1. dsteam

    dsteam Member

    Joined:
    Sep 6, 2016
    Messages:
    9
    Likes Received:
    2
    Trophy Points:
    3
    Location:
    Malaysia
    cPanel Access Level:
    Root Administrator
    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 Forums Analyst
    Staff Member

    Joined:
    Apr 11, 2011
    Messages:
    30,854
    Likes Received:
    676
    Trophy Points:
    113
    cPanel Access Level:
    Root Administrator
  3. dsteam

    dsteam Member

    Joined:
    Sep 6, 2016
    Messages:
    9
    Likes Received:
    2
    Trophy Points:
    3
    Location:
    Malaysia
    cPanel Access Level:
    Root Administrator
    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 Forums Analyst
    Staff Member

    Joined:
    Apr 11, 2011
    Messages:
    30,854
    Likes Received:
    676
    Trophy Points:
    113
    cPanel Access Level:
    Root Administrator
    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.
     
    dsteam likes this.
  5. dsteam

    dsteam Member

    Joined:
    Sep 6, 2016
    Messages:
    9
    Likes Received:
    2
    Trophy Points:
    3
    Location:
    Malaysia
    cPanel Access Level:
    Root Administrator
    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 Forums Analyst
    Staff Member

    Joined:
    Apr 11, 2011
    Messages:
    30,854
    Likes Received:
    676
    Trophy Points:
    113
    cPanel Access Level:
    Root Administrator
    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.
     
    dsteam likes this.
  7. dsteam

    dsteam Member

    Joined:
    Sep 6, 2016
    Messages:
    9
    Likes Received:
    2
    Trophy Points:
    3
    Location:
    Malaysia
    cPanel Access Level:
    Root Administrator
    All Right, now i understand. Thank you very much Michael. :):):):):)
     
    cPanelMichael likes this.
Loading...

Share This Page