Cold Email List

[Sadhikar]

Hello guys, I have 1k e-mail subscribers that have gone cold, as I didn't follow up with them for a year, so I can fairly say that they would not recognize me at all. They were mostly built using solo ads. So, my question is , how about can I go and warm up these e-mail list? Is there certain way I can get their good grace, before they hit that spam button or