Generally notifications are only being sent to actual users on the instance. You could have a look into the JIRA Enterprise Mail Handler though I can not say with certainty if it provides the functionality you are after in combination with the issue collector. This add-on is not available on JIRA OnDemand.
Hi @Terry Chafin,
You can send notifications based on E-mail data from JIRA IssueCollector using our plugin: https://marketplace.atlassian.com/plugins/net.vacom.jirassimo/cloud/overview
Just specify message template and "Email or destination list" like this:
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