Tricky.

Likely many email addresses are dead + others have forgotten your name + why they subscribed.

Your steps.

1) Clean your list.

2) Place a link at top of each message that says.

Report this message as spam, which then connects to a non-interactive, instant unsubscribe mechanism.

This keeps people from reporting you to real spam authorities.

3) Wait 10 days, for all unsubs to come in.

4) Create a targeted audience in Facebook or Traffic Oxygen to get your name in front of these people + generate some cash, without emailing them.

5) Then run this for... say 30 days...

6) Then start weekly emails + keep these email going, so your list stays warm.

If all this makes your head spin, hire someone to assist you with this.