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

Results forinternal.euw1.mail-svcs.atmailcloud.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2025-06-04T08:00:23.202	2025-06-04T00:00:00	2026-07-03T23:59:59	*.euw1.mail-svcs.atmailcloud.com	*.euw1.mail-svcs.atmailcloud.com	C=US, O=Amazon, CN=Amazon RSA 2048 M02
2025-06-04T08:00:16.16	2025-06-04T00:00:00	2026-07-03T23:59:59	*.internal.euw1.mail-svcs.atmailcloud.com	*.internal.euw1.mail-svcs.atmailcloud.com	C=US, O=Amazon, CN=Amazon RSA 2048 M04
2025-06-03T05:36:17.963	2025-06-03T00:00:00	2026-07-02T23:59:59	*.mail-svcs.atmailcloud.com	*.internal.euw1.mail-svcs.atmailcloud.com	C=US, O=Amazon, CN=Amazon RSA 2048 M02
2025-06-03T05:36:17.963	2025-06-03T00:00:00	2026-07-02T23:59:59	*.mail-svcs.atmailcloud.com	*.euw1.mail-svcs.atmailcloud.com	C=US, O=Amazon, CN=Amazon RSA 2048 M02