It can be anything! An apex, subdomain, or even a URL.

Results formail.smartweb.smart.cl

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2024-02-20T02:34:31.101	2024-02-20T01:34:30	2024-05-20T01:34:29	smartweb.smart.cl	*.smartweb.smart.cl	C=US, O=Let's Encrypt, CN=R3
2024-02-20T02:34:30.576	2024-02-20T01:34:30	2024-05-20T01:34:29	smartweb.smart.cl	*.smartweb.smart.cl	C=US, O=Let's Encrypt, CN=R3
2023-12-20T07:27:21.617	2023-12-20T00:00:00	2024-03-19T23:59:59	smartweb.smart.cl	mail.smartweb.smart.cl	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2023-12-20T07:27:20.669	2023-12-20T00:00:00	2024-03-19T23:59:59	smartweb.smart.cl	mail.smartweb.smart.cl	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2023-10-04T17:18:53.23	2023-10-04T00:00:00	2024-01-02T23:59:59	smartweb.smart.cl	mail.smartweb.smart.cl	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2023-10-04T17:18:52.378	2023-10-04T00:00:00	2024-01-02T23:59:59	smartweb.smart.cl	mail.smartweb.smart.cl	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"