Please whitelist cPanel in your adblocker so that you’re able to see our version release promotions, thanks!

The Community Forums

Interact with an entire community of cPanel & WHM users!

None of the authentication methods supported by this client are supported by your server.

Discussion in 'E-mail Discussion' started by arjanvr, May 24, 2017.

  1. arjanvr

    arjanvr Well-Known Member

    Joined:
    Dec 13, 2013
    Messages:
    113
    Likes Received:
    1
    Trophy Points:
    18
    cPanel Access Level:
    Root Administrator
    Hello,

    This week suddenly a lot of people are having trouble sending email. They get this message while before everything was working fine. Sending using SSL is working fine but when they use no ssl with mail.domainname.nl it returns this error. So nothing changed on their computer.

    "None of the authentication methods supported by this client are supported by your server."

    Did something change or do i need to make a configuration change somewhere since the clients seem to be configured just fine.

    I am confused
    Thanks
     
    #1 arjanvr, May 24, 2017
  2. arjanvr

    arjanvr Well-Known Member

    Joined:
    Dec 13, 2013
    Messages:
    113
    Likes Received:
    1
    Trophy Points:
    18
    cPanel Access Level:
    Root Administrator
    My supplier told me to do this:

    "Login from whm>>Exim Configuration manager>>Security>> Here you have to turn off this options "Require clients to connect with SSL or issue the STARTTLS command before they are allowed to authenticate with the server.""

    which did the trick but is a security risk, did something recently change in cpanel that it does not work without this because it all stopped working just a few days ago? And is there a safe workaround?
     
    #2 arjanvr, May 24, 2017
  3. cPanelMichael

    cPanelMichael Technical Support Community Manager
    Staff Member

    Joined:
    Apr 11, 2011
    Messages:
    45,442
    Likes Received:
    1,961
    Trophy Points:
    363
    cPanel Access Level:
    Root Administrator
    Twitter:
    Hello,

    Before making the change to that option, was the issue affecting email sent via a specific email client, or did you notice this happening for multiple users across different email clients?

    Thank you.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
    #3 cPanelMichael, May 24, 2017
  4. arjanvr

    arjanvr Well-Known Member

    Joined:
    Dec 13, 2013
    Messages:
    113
    Likes Received:
    1
    Trophy Points:
    18
    cPanel Access Level:
    Root Administrator
    It was for multiple users and as far as i know they are all using some form of outlook
     
    #4 arjanvr, May 24, 2017
  5. cPanelMichael

    cPanelMichael Technical Support Community Manager
    Staff Member

    Joined:
    Apr 11, 2011
    Messages:
    45,442
    Likes Received:
    1,961
    Trophy Points:
    363
    cPanel Access Level:
    Root Administrator
    Twitter:
    Hello,

    Does the SSL certificate installed for this domain name include the "mail" subdomain? If not, you'd need to update the incoming and outgoing mail server name in the email client to reflect only domain.tld instead of mail.domain.tld. Or, ensure the SSL certificate for the domain name is installed through the AutoSSL feature so that it automatically includes mail.domain.tld in the certificate.

    Thank you.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
    #5 cPanelMichael, May 29, 2017
  6. arjanvr

    arjanvr Well-Known Member

    Joined:
    Dec 13, 2013
    Messages:
    113
    Likes Received:
    1
    Trophy Points:
    18
    cPanel Access Level:
    Root Administrator
    Well the problem was it stopped sending on non-ssl settings so can that be related to the certificate?
     
    #6 arjanvr, May 29, 2017
  7. cPanelMichael

    cPanelMichael Technical Support Community Manager
    Staff Member

    Joined:
    Apr 11, 2011
    Messages:
    45,442
    Likes Received:
    1,961
    Trophy Points:
    363
    cPanel Access Level:
    Root Administrator
    Twitter:
    Hello,

    Could you open a support ticket using the link in my signature so we can take a closer look? You can post the ticket number here so we can update this thread with the outcome.

    Thank you.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
    #7 cPanelMichael, May 29, 2017
(You must log in or sign up to post here.)
Loading...
Similar Threads - None authentication methods
  1. chris0147

    Disk usage show none on both accounts

    chris0147, Oct 22, 2018, in forum: General Discussion
    Replies:
    6
    Views:
    96
    cPanelLauren
    Oct 24, 2018
  2. Lee Wickham

    SOLVED None of the certificates in the system ssl storage were acceptable to use for the “cpanel” service.

    Lee Wickham, Sep 24, 2018, in forum: Security
    Replies:
    12
    Views:
    238
    Infopro
    Oct 18, 2018
  3. Lethe

    FTP too many connections - None listed in cPanel

    Lethe, May 16, 2018, in forum: General Discussion
    Replies:
    1
    Views:
    317
    Infopro
    May 16, 2018
  4. MaRiOsGR66

    how to disable .htaccess - AllowOverride None for 1 account only

    MaRiOsGR66, Nov 15, 2017, in forum: Workarounds and Optimization
    Replies:
    3
    Views:
    565
    cPanelMichael
    Nov 21, 2017
  5. Nick57

    None of the certificates in the system ssl storage were acceptable to use for the “cpanel” service.

    Nick57, Sep 27, 2017, in forum: Security
    Replies:
    2
    Views:
    575
    Nick57
    Sep 27, 2017

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Accept Learn More...
    Dismiss Notice