Universal Email includes options for setting email limits such as a wait time between sending each email, and the maximum number of emails that can be sent in a time frame.
these options are available on the to settings screen.
The to settings screen will also allow you to select a recordset to loop through for the To address.
There is no tutorial specific to setting this up, but the feature tour on the Video tab of the universal Email support page will talk about each of the settings available:
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