The Internet Archive discovers and captures web pages through many different web crawls.
At any given time several distinct crawls are running, some for months, and some every day or longer.
View the web archive through the Wayback Machine.
Domestic mail (Periodicals Mail, USPS Marketing Mail, and Package Services) addressed to a domestic addressee who has moved to another country must not be forwarded to another country but must be returned to the sender. Domestic mail that cannot be returned to the sender because of an incorrect, incomplete, illegible, or missing return address must be treated as dead mail and disposed of as provided in DMM 507. (See 762.2 for items bearing foreign return address.)