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

Results forwebmail.geeksmotion.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2018-04-19T04:29:19.582	2018-04-19T00:00:00	2018-07-18T23:59:59	geeksmotion.com	webmail.geeksmotion.com	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2018-04-19T04:28:59.293	2018-04-19T00:00:00	2018-07-18T23:59:59	geeksmotion.com	webmail.geeksmotion.com	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2018-02-03T19:45:08.12	2018-02-02T00:00:00	2018-05-03T23:59:59	geeksmotion.com	webmail.geeksmotion.com	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2017-11-08T19:00:08.009	2017-11-06T00:00:00	2018-02-04T23:59:59	geeksmotion.com	webmail.geeksmotion.com	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2017-08-25T19:36:30.38	2017-08-21T00:00:00	2017-11-19T23:59:59	geeksmotion.com	webmail.geeksmotion.com	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"