What is a cousin domain or a look-alike domain?

A cousin domain, which is also referred to as a look-alike domain, is a Domain Name System (DNS) domain that looks similar to another name when rendered by a Mail User Agent (MUA).

For example, groupA.example is a cousin domain of group.example. Other examples include misspellings of a domain, such as and

Cousin domains typically are created as a phishing tool to spoof your brand and domain name.

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