opt in-list - a list in which someone subscribes into by entering their personal information, usually email and name and will provide different information about services and products that can help you out if interested (opt out means to quit this list)
safelist- A safelist allows you to send email "blasts" to all members of a safelist, meaning that you can advertise your business or service, but the catch is that you must receive other email ads in your inbox also so get ready to spend some time cleaning your inbox out
Optin Lists.... 
Re: Optin Lists.... 
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