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I'm attempting to set up e-mail notifications using collectd and the threshold / notify_email plugins. I'm running Ubuntu 14.04 LTS, attempting to relay e-mails through Amazon SES.

Relevant package versions:

  • collectd 5.4.0-3ubuntu2 amd64
  • libesmtp6 1.0.6-1ubuntu2 amd64

Relevant configuration:

LoadPlugin syslog
LoadPlugin cpu
LoadPlugin load
LoadPlugin notify_email
LoadPlugin threshold

<Plugin syslog>
  LogLevel "info"
  NotifyLevel "OKAY"

# Actual credentials redacted...
<Plugin notify_email>
  From "user@example.com
  Recipient "user@example.com"
  Subject "[collectd] %s on %s!"

  SMTPServer "email-smtp.us-east-1.amazonaws.com"
  SMTPPort "465"
  SMTPUser ""
  SMTPPassword ""

<Plugin threshold>
    <Type "load">
        DataSource "shortterm"
        WarningMax 0.5
        Hysteresis 0.3

    <Type "cpu">
        Instance "user"
        WarningMax 5
        Hits 1

I see the notifications come through in /var/log/syslog but I'm not seeing any e-mails (or error messages). I know that the credentials are correct.

I went a step further and built collectd 5.4.1 from source with --enable-debug so I could set LogLevel "debug" for syslog, but nothing indicating any sort of failure was revealed.

I have noticed that using a different SMTP port (e.g. 25 or 587) did generate some debug output after notifications came through (530 Must issue a STARTTLS command first followed by 530 Authentication required).

I've also noticed that just adding the plugin configuration for notify_email makes the collectd service fail to stop without a kill -9.

Anyone else encountered similar issues using this plugin with Ubuntu 14.04?

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