Certbot

Certdir/etc/letsencrypt/live/
Listcertbot certificates
Generatecertbot certonly -d mail.flipdare.com
Generatecertbot certonly -d www.flipdare.com -d flipdare.com

Email Setup

root@localhost:/etc/courier/old# cd /etc/letsencrypt/live/mail.orbious.com-0001/                                                                                                                                                     
root@localhost:/etc/letsencrypt/live/mail.orbious.com-0001# cat privkey.pem cert.pem > /etc/courier/cert.pem                                   
root@localhost:/etc/letsencrypt/live/mail.orbious.com-0001# tail -20 /etc/courier/dhparams.pem >> /etc/courier/cert.pem   
root@localhost:/etc/letsencrypt/live/mail.orbious.com-0001# cp fullchain.pem /etc/courier/fullchain.pem

- Restart imap and postfix.

Nginx setup

root@localhost:/etc/nginx/sites-enabled# rm newton                                                                                                                                                           
root@localhost:/etc/nginx/sites-enabled# ln -s ../sites-available/mail mail                                                                                                                                  
root@localhost:/etc/nginx/sites-enabled# service nginx restart