A Hotmail.com directory is a collection of email addresses that are associated with the Hotmail.com domain. This directory can be used to find people who have Hotmail accounts, or to send mass emails to people who have Hotmail accounts. A catch-all list is a type of email address that is designed to catch all emails that are sent to a particular domain. For example, if you have a catch-all list for the domain example.com, then any email that is sent to example.com@hotmail.com will be delivered to your catch-all list.
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