Seeking advice on email marketing

I have over 100,000 email addresses that we acquired from our previous business, I want to let our old clients know about our new product and I am looking for a mass email system that will allow us to send out but not get blacklisted by the receivers email ISP's or our .SP,

I have been looking at Amazons aws with maybe something like sendblaster or sendy.

Can anyone offer any advice as to the best and cheapest way to get my emails out without being blocked.

Sendy is in my opinion would be a cost effective option

I am on the same boat, I may be one of the last to move out from CL. I harvest tons of emails from the city's that I post, over a MM but I am stuck on clean the list, so far any method I try didn't work, if you like we may row the boat and share info

If you have a legit clean double optin list, then you can go for Amazon AWS.

other wise you could hire a freelancer to send them out for you.

If you go for a custom SETUP it would cost you much higher, ,so a custom setup is recommended only in the cases of high recurring mail volume....

If you need further help feel free to PM me