Letsencrypt tip

[Gary]

As you know, letsencrypt certs can be automatically updated. However, you need to reload/restart Postfix/Dovecot to use the new cert. My email client insisted I had an expired cert. I couldn't download or send email. (Fortunately I'm on a test domain, getting ready for the Oct 1st Google insistence on encryption.) Letsencrypt suggests running acme on a daily basis, so just do the same for Postfix and Dovecot.