12.2 Forms of Alias Delivery
Addresses in the righthand side of an alias entry can take four forms:
LHS: user
LHS: /file
LHS: |program
LHS: :include: file
The user specifies final delivery to a user??™s mail spool file (subject to change by the
user??™s ~/.forward file), or delivery to a new address (e.g., newuser or user@newsite).
The /file specifies delivery by appending to a file. The |program specifies delivery by
piping the message through a program. The :include: specifies processing of a mailing
list. The first three are covered here. The last is covered in the next chapter.
These righthand sides can be combined on a single line, where one is separated from
another by a comma. For example:
LHS: user, /file
12.2.1 Delivery to Users
Any address in the list of addresses to the right of the colon that does not begin with
a /, |, or : character is considered to be the address of a user. The address can be
local or remote.
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466 | Chapter 12: Maintain Aliases
If that user address to the right of the colon is prefixed with (or contains) a backslashch
aracter (\) and the address is a local one, all further aliasing is suppressed
(including reading the user??™s ~/.forward file), and the message is delivered with the
local delivery agent.
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