You may have Life Insurance through MainePERS.
State retirees have the minimum amount of Life Insurance through MainePERS and the value decreases over time to a lower amount.  During employment and at retirement you may have increased the life insurance plan.  To determine your life insurance benefit, contact MainePERS at (207) 512-3100 or 1-800-451-9800.
As for Educators and Participating Local District retirees, this depends on if your former employer offered this benefit.  You can contact MainePERS at (207) 512-3100 or 1-800-451-9800 to determine your benefit.
Another information source is:
https://www.mainepers.org/Group%20Life%20Insurance/Group_Life_Insurance.htm