It can be anything! An apex, subdomain, or even a URL.
Results forwww.knowledge.smtp.com.00d60000000iqaeea0.live.siteforce.com
knowledge.smtp.com.00d60000000iqaeea0.live.siteforce.comsmtp.com.00d60000000iqaeea0.live.siteforce.comcom.00d60000000iqaeea0.live.siteforce.com00d60000000iqaeea0.live.siteforce.comlive.siteforce.comsiteforce.comcom
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