My domain is pypicache.repology.org, and I've just got an expiration email:
From: Let's Encrypt Expiry Bot <email@example.com> Subject: Let's Encrypt certificate expiration notice for domain "pypicache.repology.org" Received: from [220.127.116.11] by mandrillapp.com id b49340094b964db895e14d2a61c13240; Mon, 20 Sep 2021 18:57:24 +0000 Message-Id: <20210920T185724.firstname.lastname@example.org> ... Your certificate (or certificates) for the names listed below will expire in 10 days (on 01 Oct 21 01:07 +0000) ... pypicache.repology.org ...
However, browser and certbot say that the certificate was in fact recently renewed and is not going to expire in October:
Certificate Name: pypicache.repology.org Serial Number: 4b34517b9f8e08c9abfb26a68d1bd99395a Key Type: RSA Domains: pypicache.repology.org Expiry Date: 2021-12-03 00:37:38+00:00 (VALID: 73 days)
My guess is that either there is some error or I may have two certificates for the same domain. In the latter case, the email should take such case into account to not be misleading and confusing. Ideally, it should say right away that I have multiple certificates for this domain with issue and expiration dates and serial number.