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Email (or Email WS) - make sure that "Enable Queries Emails SMTP" (or "Enable Queries Emails SMTP WS") is set to true in the System Parameters page.
Syslog message - DPOD will generate a separate syslog message for each result returned for the query - for example, for the query "Device CPU is above 80%" - each device that satisfies the query will generate a separate syslog message - the Syslog target server's host name, port and the syslog severity field value (Error, Info, etc)can be configured in the System Parameters page