collection.cooperhewitt.org.smtp.gai18.xyz =

Is collection.cooperhewitt.org.smtp.gai18.xyz a
temporary email domain?

Yes, collection.cooperhewitt.org.smtp.gai18.xyz is a temporary/disposable email domain and should be blocked. This domain is typically used for short-term email access and does not represent legitimate long-term user accounts. We strongly recommend blocking registration attempts using this domain to prevent spam accounts.