which are the best email marketing platforms?

are there any email-marketing tools that we can use for free? 

It is really hard to trust on something especially while you are going to pay for it. I am researching on paid marketing. can anyone tell me that is there any good paid marketing sources/tools, which I can use?

Can anyone tell me what are the benefits of Reseller Hosting and can it really makes a good amount of money?

I am just going to start my own website I just want to that is content marketing actually work to rank a website?