Hi, I've been doing this for +10 years and I have a lot of experience in email marketing, I guarantee that with all the information and things you give me about your audience, I can get a good conversion average with your email list - mails.
But I need to know about some criteria beforehand:
Are contacts leads? Where did you get them from? Or are they already "customer" people who are interested in buying your product?
Other than that, I need to know.
What is the relationship of the contacts with you?
And what is your niche?
Sales, Fashion, ee etc ...