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Your certificate (or certificates) for the names listed below will expire in
20 days (on 30 Apr 18 01:19 +0000). Please make sure to renew
your certificate before then, or visitors to your website will encounter errors.
but
certbot-auto certificates
Expiry Date: 2018-07-02 17:00:25+00:00 (VALID: 83 days)
For details about when we send these emails, please visit Expiration Emails - Let's Encrypt. In particular, note that this reminder email is still sent if you've obtained a slightly different certificate by adding or removing names. If you've replaced this certificate with a newer one that covers more or fewer names than the list above, you may be able to ignore this message.
2018-01-30: You issued the certificate the email is talking about.
2018-02-02: You issued a new certificate with a new subdomain and probably deleted the old certificate.
2018-04-03: The new certificate was renewed on schedule.
You’re apparently no longer using the 2018-01-30 certificate that’s about to expire, so you can just ignore the email about it. You’ll get a couple more emails, and then they’ll stop after it expires.