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

Results forww25.mailer.lossofmemory.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2025-11-22T14:41:19.769	2025-11-22T13:42:49	2026-02-20T13:42:48	ww25.mailer.lossofmemory.com	ww25.mailer.lossofmemory.com	C=US, O=Let's Encrypt, CN=R12
2025-11-22T14:41:19.61	2025-11-22T13:42:49	2026-02-20T13:42:48	ww25.mailer.lossofmemory.com	ww25.mailer.lossofmemory.com	C=US, O=Let's Encrypt, CN=R12
2025-05-02T10:43:49.485	2025-05-02T09:45:17	2025-07-31T09:45:16	ww25.mailer.lossofmemory.com	ww25.mailer.lossofmemory.com	C=US, O=Let's Encrypt, CN=R10
2025-05-02T10:43:47.882	2025-05-02T09:45:17	2025-07-31T09:45:16	ww25.mailer.lossofmemory.com	ww25.mailer.lossofmemory.com	C=US, O=Let's Encrypt, CN=R10