server expert needed urgent

i have a digital ocean droplet, and where i setup fastpanel as it have options to add users and i can set privilagies like they can access filemanager, cron jobs, etc etc but i can give access to them emails but as main user i can access emails and the other thing is there is no mail server too, i just need an expert who can setup email server and as liek cpanel i can also create emails in fastpanel too that option i can see but i dont have smtp server my budget is fixed 50$ for this