Hi,My company upgraded to Kentico 12 from Kentico 10 and since then the email notification system has stopped working. The emails end up in the email queue without being sent.Without changing any of the default SMTP server settings in settings -@ system -@ emails, the error message I receive from the queue says, @An error occurred while attempting to establish an SSL or TLS connection. The hostname did not match the name given in the server's SSL certificate. The remote certificate is invalid according to the validation procedure.@The server name entered in the default SMTP settings is a relay server that redirects requests to one of two servers. I manually entered the name of one of the two servers and received a different error message in the email queue, which said, @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: A certificate chain processed, but terminated in a root certificate which is not trusted by the trust provider. The remote certificate is invalid according to the validation procedure.@The person in charge of server configurations said that everything was working fine before the upgrade and that the problem should be coming from the CMS. I read an article posted here on devnet.kentico.com about testing SMTP server connectivity with an open-source SMTP server for testing purposes. I downloaded and tested with smtp4dev and got the same message (certificate chain processed message) as when entering a specific server name.Any ideas about what might be going on? Any help would be greatly appreciated.Sincerely,
Marcelo
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