Yes! You can send up to 50 emails a month without paying anything. If you need to send more than 50 emails a month, then you'll want to sign up for a Direct Mail account. There are a variety of pricing plans available to fit your budget.
To sign up, choose Direct Mail > Direct Mail Account from the menu bar.
Does "50 emails" mean 50 emails or 50 recipients?
50 emails. For example, if you wanted to remain on Direct Mail's free pricing plan, you could send 1 email to 50 people, 2 emails to 25 people, or 5 emails to 10 people (or any other combination) each month.