No. In the decade plus I've been doing e-mail marketing this has never been an issue.

Also, this on the sales page is a huge turn off: "Pick the most expensive plan you can."

Thank you all for your input, I sincerely appreciate it. My reason for asking and my reason behind having very little on the website is because I want to draw out what the customer wants and needs and what their objections are rather than making any assumptions, this is my "customer development" process and I've built the bare minimum in order to allow potential customers to guide me.

I can tell you the amount of compromised lists I've discovered over the past few months is staggering, this isn't a small problem, it's a huge problem.

Charles I believe your response is geared towards people that run their own infrastructure, my target market is users of third-party automated marketing services that don't have the same level of control.

My service requires no access at all to my customers email lists or accounts, that is likely to change in the future as the opportunity grows and as we establish trust in the marketplace but right now my minimum viable product does not include these other features that we're testing, I do not want the liability issues and I do not want to create additional risk.

In the past few months testing we've found more than one in three lists are compromised and being abused / misused by insiders or external attackers.

Charles, your response was awesome. I sincerely appreciate it. Thank you!

I am not sure that I see a benefit that would justify investing in this type of service. With the current emphasis on opt-in validation I think there is more control provided the list owner making monitoriing an expensive option.