Could not connect to SMTP host

Nirjonadda

• January 10, 2018 09:30

Why I am can not send email ? SMTP Error: Could not connect to SMTP host. we are using mailgun.com for sending email. My SMTP Settings is Server: smtp.mailgun.org, ports 25, Encryption: TLS/SSL. I can confirm that email sending work Encryption: unsecured, So how server secure connection work? [E_WARNING] stream_socket_enable_crypto(): SSL operation failed with code 1. OpenSSL Error messages: error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed

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  cPanelMichael

  • January 10, 2018 15:31

  Hello, It looks like the SMTP connection attempt was made using weak ciphers. Check to see if the solution on the following post works if you want to allow those connections (not recommended due to the decreased security): Thank you.

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  Nirjonadda

  • January 10, 2018 15:41

  Hello, It looks like the SMTP connection attempt was made using weak ciphers. Check to see if the solution on the following post works if you want to allow those connections (not recommended due to the decreased security):

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  cPanelMichael

  • January 10, 2018 17:55

  Hello, Did you try the other workarounds referenced on that thread, or did you only adjust the weak ciphers option? Thank you.

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  Nirjonadda

  • January 10, 2018 18:14

  Hello, Did you try the other workarounds referenced on that thread, or did you only adjust the weak ciphers option? Thank you.

  
  I think we have fixed this issue with CSF installation.

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  cPanelMichael

  • January 10, 2018 18:15

  I think we have fixed this issue with CSF installation.

  
  I'm glad to see you were able to find a solution. Feel free to let us know the specific change you made in your CSF configuration. Thank you.

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  Nirjonadda

  • January 10, 2018 18:28

  I'm glad to see you were able to find a solution. Feel free to let us know the specific change you made in your CSF configuration. Thank you.

  
  Installed CSF and allowed port 25 but before port 25 where are blocked for secure connection?

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  cPanelMichael

  • January 10, 2018 18:37

  Installed CSF and allowed port 25 but before port 25 where are blocked for secure connection?

  
  Hi, Thank you for sharing the outcome. It likely relates to the same issue referenced on the following third-party URL since it applies to a smart host configuration: Configure CSF to allow outbound SMTP Let us know if you encounter any additional issues. Thank you.

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