Hello,
I can install and configure mail server at digital ocean doplet, I have already done similar job before.
I am highly skilled with Centos-7, Nginx, WHM, VPS Server, Ubuntu, Nginx, Plesk, Cpanel, VPS Server, GoDaddy, Server Optimization, AWS EC2 setup, Digital Ocean ,Server setup, cPanel/WHM,Debian, Cpanel installation, SSL installation, Website migration etc etc.
Regards