Website and mailing list service

I currently have a small website that I'm thinking of rebuilding. I have a mailing list that you can sign up for. The mailing list is through a free service so I don't expect it to be much but it really sucks. I can't send a mass email to everyone on my list like I'm supposed to be able to and am getting no response from customer service so I'd like to find another mailing list service. Thing is I really don't wanna get one I have to pay for. Any ideas?