Re-starting a Newsletter After 3 Years

I'm thinking about re-starting a newsletter for my website and wanted to get some opinions:

I currently have a little over 1,000 subscribers but I havent sent out a newsletter for almost 3 1/2 years. Should I just start sending the newsletters again and hope that people remember they signed up for it? I don't want them to unsubscribe and list it as spam or 'I never signed up for this newsletter.'

Or should I just delete them all and start from scratch?

Thanks or the help!