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

Results formail.studentsofcolormatter.org

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2025-11-23T16:58:49.145	2025-11-23T16:00:18	2026-02-21T16:00:17	mail.studentsofcolormatter.org	mail.studentsofcolormatter.org	C=US, O=Let's Encrypt, CN=R12
2025-11-23T16:58:48.858	2025-11-23T16:00:18	2026-02-21T16:00:17	mail.studentsofcolormatter.org	mail.studentsofcolormatter.org	C=US, O=Let's Encrypt, CN=R12
2025-08-31T18:16:46.216	2025-08-31T17:18:15	2025-11-29T17:18:14	mail.studentsofcolormatter.org	mail.studentsofcolormatter.org	C=US, O=Let's Encrypt, CN=R13
2025-08-31T18:16:45.914	2025-08-31T17:18:15	2025-11-29T17:18:14	mail.studentsofcolormatter.org	mail.studentsofcolormatter.org	C=US, O=Let's Encrypt, CN=R13