How good are these email open rates?

Question to all Email Marketers here-

How good are these open rates for automated email campaigns providing valuable content in the emails? Users had signed up for these emails from our website.

Process:

1. We have an exit popup where we offer to send users free social media post ideas on email.
2. We capture their input and email and make them confirm the email.
3. These automated emails are sent to them periodically post that.