Aliases and Mailing Lists
Aliases allow mail that is sent to one address to be redirected to another address. They also allow mail to be appended to files or piped through programs, and form the basis of mailing lists. The heart of aliasing is the aliases(5) file (often stored in database format for swifter lookups). Aliasing is also available to the individual user via a file called ~/.forward in the user’s home directory.
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