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CSNAPC-7503: After SC upgrade to 6.0, the email notification for the jobs are no longer being processed by Server

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Issue

  • After SC upgrade to 6.0, the email notification for the jobs are no longer being processed by Server.
    Getting below error:
    An error occurred while attempting to establish an SSL or TLS connection. The server's SSL certificate could not be validated for the following reasons:
    • The server certificate has the following errors:
      • The revocation function was unable to check revocation for the certificate.
      • The revocation function was unable to check revocation because the revocation server was offline.
    • An intermediate certificate has the following errors:
      • The revocation function was unable to check revocation for the certificate.
      • The revocation function was unable to check revocation because the revocation server was offline.
    • The remote certificate was rejected by the provided RemoteCertificateValidationCallback. 
  • When sending a test email to SMTP server configured to use port 25 without TLS via Global Settings in SnapCenter GUI, the following error is displayed:

An error occurred while attempting to establish an SSL or TLS connection. This usually means that the SSL certificate presented by the server is not trusted by the system for one or more of the following reasons: 1. The server is using a self-signed certificate which cannot be verified. 2. The local system is missing a Root or Intermediate certificate needed to verify the server's certificate. 3. A Certificate Authority CRL server for one or more of the certificates in the chain is temporarily unavailable. 4. The certificate presented by the server is expired or invalid. 5. The set of SSL/TLS protocols supported by the client and server do not match. See https://github.com/jstedfast/MailKit/blob/master/FAQ.md#ssl-handshake-exception for possible solutions. Authentication failed because the remote party sent a TLS alert: 'HandshakeFailure'. The message received was unexpected or badly formatted.

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