How to make sure contacts don't receive any emails in TEST console?

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When oracle configure the TEST console, all the contacts email address have .invalid suffix so that no emails are sent to the contacts in TEST console.

I are performing some tests that requires importing several lists of contacts (XML Files with contact) in the OSC (RightNow Test Console) database via web services. The mailbox on our TEST console is already enabled because previously we have been testing some mailing features.

The issue is - If we go ahead with this test import via web services that will import thousands of contacts in the TEST console database, I need to make sure there are no background processes / business rules etc that sends an email to these contacts if email address is valid (since test console is an exact copy of production). So, in order to avoid this I would like to know: