Alertmanager fails to send email alerts for insecure connection in RHOCP 4

Solution Verified - Updated -

Issue

  • Alertmanager fails to send alerts to email receiver for insecure connection.

  • Below logs are observed in alertmanager pods:

    level=warn ts=2023-03-20T22:41:37.726Z caller=notify.go:724 component=dispatcher receiver=Critical integration=email[0] msg="Notify attempt failed, will retry later" attempts=1 err= "*smtp.plainAuth auth: unencrypted connection"
level=warn ts=2023-03-20T22:41:37.735Z caller=notify.go:724 component=dispatcher receiver=Critical integration=email[0] msg="Notify attempt failed, will retry later" attempts=1 err= "*smtp.plainAuth auth: unencrypted connection"
  • Is it possible to use insecure connection with SMTP authentication ?

Environment

  • Red Hat OpenShift Container Platform (RHOCP)
    • 4

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