I' use Aweber and Email Aces. I like the feature or Aweber but for my with out a doubt Gary’s Email Aces have the best deliverability rate.

I also have a huge list with 1 shopping cart but the deliverability is not nearly as good.


I have one of my coaching clients who use get response and I’m just not a fan of it.
But that is just my personal thoughts.


But the real key is are you going to use a single or double opt in. I have found this to be the biggest factor in my deliverability rate.

Thanks
Charles