Warning: stream_socket_enable_crypto(): Peer certificate CN=`uk.mthservers.com’

  • Resolved chazg

    (@chazg)


    6 years, 10 months ago

    The [email protected] inbox is setup using Office365.
    When I fill out any of the contact forms on the website and hit Submit, they do not send. The WP Mail SMTP settings are correct. I am using:
    From Email: [email protected]
    SMPT Host: smtp.office365.com
    SMTP Port: 587
    Encryption: TLS
    Authentication: On
    SMPT Username: [email protected]
    SMPT Password: (what ever the password is)

    When I click on the Email Test tab and send a test email, I get the following error message:

    There was a problem while sending a test email. Related debugging output is shown below:

    Versions:
    WordPress: 4.9.2
    WordPress MS: No
    PHP: 5.6.33
    WP Mail SMTP: 1.2.2

    Params:
    Mailer: smtp
    Constants: No
    ErrorInfo: SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting
    Host: smtp.office365.com
    Port: 587
    SMTPSecure: tls
    SMTPAutoTLS: bool(true)
    SMTPAuth: bool(true)

    Server:
    OpenSSL: Yes
    Apache.mod_security: No
    SMTP Debug:
    2018-02-01 10:20:05 Connection: opening to smtp.office365.com:587, timeout=300, options=array (
    )
    2018-02-01 10:20:05 Connection: opened
    2018-02-01 10:20:05 SERVER -> CLIENT: 220-uk.mthservers.com ESMTP Exim 4.89_1 #1 Thu, 01 Feb 2018 10:20:05 +0000
    220-We do not authorize the use of this system to transport unsolicited,
    220 and/or bulk e-mail.
    2018-02-01 10:20:05 CLIENT -> SERVER: EHLO https://www.guardiansupport.co.uk
    2018-02-01 10:20:05 SERVER -> CLIENT: 250-uk.mthservers.com Hello https://www.guardiansupport.co.uk [5.101.138.188]
    250-SIZE 52428800
    250-8BITMIME
    250-PIPELINING
    250-AUTH PLAIN LOGIN
    250-STARTTLS
    250 HELP
    2018-02-01 10:20:05 CLIENT -> SERVER: STARTTLS
    2018-02-01 10:20:05 SERVER -> CLIENT: 220 TLS go ahead

    Warning: stream_socket_enable_crypto(): Peer certificate CN=uk.mthservers.com' did not match expected CN=smtp.office365.com’ in /home/guardian/public_html/wp-includes/class-smtp.php on line 369

    2018-02-01 10:20:05 SMTP Error: Could not connect to SMTP host.
    2018-02-01 10:20:05 CLIENT -> SERVER: QUIT
    2018-02-01 10:20:05 SERVER -> CLIENT: 221 uk.mthservers.com closing connection
    2018-02-01 10:20:05 Connection: closed
    2018-02-01 10:20:05 SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting

    Can someone please advise me with regards to what to do, thanks.

    Chaz

    • This topic was modified 6 years, 10 months ago by chazg.

    The page I need help with: [log in to see the link]

Viewing 5 replies - 1 through 5 (of 5 total)
  • Plugin Author Slava Abakumov

    (@slaffik)

    Hi,

    1) Update the plugin to the latest version.
    2) Contact your hosting support with a question, why they are redirecting requests from smtp.office365.com to uk.mthservers.com. They need to allow outbound request to send emails via SMTP.

    You might need to change the SMTP Host to some kind of relay (hosting should you provide all the correct values, ask them).

    Thread Starter chazg

    (@chazg)

    Hi Slava,

    Thank you for the reply.
    I will contact the hosting company and see what they say. Will update the ticket in due cause.

    Plugin Author Slava Abakumov

    (@slaffik)

    @chazg

    They are really slow…

    Thread Starter chazg

    (@chazg)

    Hiya,

    this is what the hosting company said:

    In the error message, we have the below:
    Warning: stream_socket_enable_crypto(): Peer certificate CN=uk.mthservers.com’ did not match expected CN=smtp.office365.com’ in /home/guardian/public_html/wp-includes/class-smtp.php on line 369

    this is a certificate mismatch from your script, it is expecting Office 365 SSL, not our CN.

    Could you rectify this first please.

    Im not sure what they mean?

    [ Please do not bump. ]

    Plugin Author Slava Abakumov

    (@slaffik)

    Here is lots of information about certificates problems and what to do: https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting#certificate-verification-failure

Viewing 5 replies - 1 through 5 (of 5 total)
  • The topic ‘Warning: stream_socket_enable_crypto(): Peer certificate CN=`uk.mthservers.com’’ is closed to new replies.