Monkey

@Patrick , In all case if you use an external tool or a new apps use the customer data, the customer must accept to share the information. Complicate all of that !!

I have been a similar problem and found the solution. I use now the configuration with gmail smtp.

@Janett, it's not simple, the best is to use an approach like test A/B. Maybe your investment will work with Facebook and not with Google. You must test and analyze the statistics and conversion. After you can make a decision about your approach.

@ClicShopping Thank you for your effort.

Like you know some event could be an opportunity to increase the sales. Are you interesting to share your approach ? Specials, specific design, improve your adwords, reworks your internal link ....