8.16 on page 767) to be selected. Generally, local addresses select the local
delivery agent, which normally has the F=A flag set. Nonlocal addresses (suchas
gw@another.host) generally select one of the smtp delivery agents, which normally do
not have the F=A flag set.
* If you set the F=A flag for the various smtp delivery agents, the local part of an alias can be specified as a network
or remote address, such as user@host.domain.
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12.1 The aliases(5) File | 463
Prior to V8.7 sendmail, an address had to select the local delivery to allow itself to be
aliased.
If the selected delivery agent has the F=u flag set (?§20.8.46 on page 780), the address
will be converted to lowercase before being looked up in the aliases database.
In the earlier example, the address george (after processing) selects the local delivery
agent, and so these alias lines are legal. Internally (or in its database), sendmail stores
the earlier alias as:
george: gw
When mail arrives that is addressed for delivery to george, sendmail rewrites that
address withth e canonify rule set 3 and the parse rule set 0. The parse rule set 0
selects the local delivery agent (or, for V8.7 and above, any agent with F=A set). The
address george is looked up and replaced with gw.
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