I am trying to update the old email address which was being used to recieve expiry notification from the amazing Letsencrypt. However, I did not find a way to do it amazingly :O.
What I did try however: I deleted the old certificate in the hope that certbot would have asked me regarding the new email but the fact it didn't (poor me)
I deleted the old certificate using this command
then I chose the domain which I would like to delete.
Then I regenerate a new letsencrypt certificate which was a success no errors found and the website was still online without any further certificate issue (prost to that!):
sudo certbot certonly --nginx -d thecompany.com
But then however, CERTBOT did not ask me for a new email address! (omg!)
And now I don't know what to do, feels like banging my head to the wall won't help, so, I let my fingers dance on my keyboard and asked this question to the nicest folks at here :).