$Y
The UUCP relay for unclassified hosts mc configuration
$Y holds as its
value the name of the host that will handle all UUCP
mail that was not otherwise handled by class
$=V, $=W, or $=X. See SITECONFIG mc Macro (Obsolete) on page 609 for a discussion of UUCP relays in
general, and how this macro relates to $V, $W, and $X macros.
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