If you go through your cpanel and set up your email, you can make it so it is double opt-in.
That is a good option if you have say, 500 subscribers or less.
Get more, yes, do move on over to aweber.
But the big but is getting subscribers!
Got to be careful on how you advertise to get subscribers.
So many will join only if there are freebies, or they will join just to see what you put out.
The successful marketers use niche lists, each one geared to one item or niche.
Then you have to set up a schedule of when you will email your list.
Too often and you risk losing all.
Too far apart and people will forget they are on the list and will opt out.
To anyone starting out, I would say research and check out current lists in your niche, etc.