OS 10.12.6

I cannot send or receive apple mail..will not accept password. Is there way to reset the password in terminal?

jaybass


OS 13.6.6 iMac (Retina 5K, 27", 2017, 3.4 GHz Intel Core i5, 24 GB RAM, 2400 MHz DDR4. SuperDuper. 1 TB Lacie HD