Versions (relevant - OpenSearch/Dashboard/Server OS/Browser): Opensearch Version 2.11.1 Describe the issue: I have configured alerting and notification on my Opensearch cluster but whenever I test the notification, it errors out. On the Opensearch dashboard I see {“statusCode”:424,“error”:“Failed…

Hi @ic1000 Have you tried to use SSL/TLS instead of STARTTLS ?

@Eugene7 Hi yes I have, when switched to SSL/TLS i see this error message: statusCode=424, statusText=sendEmail Error, status:Could not connect to SMTP host

Please ensure that TLS configuration is compatible with the SMTP server.

Hi @ic1000 , In order to check whether the SMTP server is reachable, please execute from the OpenSearch server the following command: curl --ssl-reqd \ --url 'smtps://mail.example.com:465' \ --user 'username@example.com:password' \ --mail-from 'myself@example.com' \ --mail-rcpt 'receiver@e…

Hi @ic1000 or others, I am quite new in the Opensearch world. Could you please provide me with the full procedure for how to set up the mailing notification? I have filled the mailing section but it is missing the credentials thus fails to send the email. Thanks in advance, Yehuda

Must ensure that the TLS/SSL setting are correctly configured for the SMTP connection. Also check there is no firewall is blocking the connection from the openssh server to SMTP server on a specified port.

Could not connect to SMTP host when testing

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system Closed May 20, 2024, 11:01pm 8

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Could not connect to SMTP host when testing

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