certbot delete --cert-name mail.allanimals.info-0001
Saving debug log to /var/log/letsencrypt/letsencrypt.log
The following certificate(s) are selected for deletion:
mail.allanimals.info-0001
WARNING: Before continuing, ensure that the listed certificates are not being
used by any installed server software (e.g. Apache, nginx, mail servers).
Deleting a certificate that is still being used will cause the server software
to stop working. See User Guide — Certbot 2.2.0 documentation for information on
deleting certificates safely.
Are you sure you want to delete the above certificate(s)?
(Y)es/(N)o: Y
Deleted all files relating to certificate mail.allanimals.info-0001.
certbot renew
Saving debug log to /var/log/letsencrypt/letsencrypt.log