Encrypt TLS-SNI-01 validation is reaching end-of-life

If you are using Let’s Encrypt certification and have received an email to take action on renewal of your certificate.  That’s because lets Encrypt had announced last October 2018, that they will end support for TLS-SNI-01 validation method on February 13, 2019.  You need to update your ACME client to use an alternative validation method …