sendmail, 4th Edition

The LOCAL_UUCP mc Macro

If you enable UUCP, the parse rule set 0 normally adds rules that select UUCP delivery agents. First, locally connected UUCP addresses are detected and the appropriate UUCP delivery agent is selected based on each such address found. Addresses in the class $=Z select the uucp-uudom delivery agent. Addresses in the class $=Y select the uucp-new delivery agent. And addresses in the class $=U select the uucp-old delivery agent.

Finally, the parse rule set 0 adds rules that detect remotely connected UUCP addresses.

Beginning with V8.13, if you need to add rules between these two phases (between the detection of local UUCP addresses and remote UUCP addresses), you may do so by utilizing this new LOCAL_UUCP mc macro. For example, the following mc file entry:

LOCAL_UUCP
R$* < @ $={ServerUUCP} . UUCP. > $*        $#uucp-uudom $@ $2 $: $1 < @ $2 .UUCP. >
$3

causes the preceding new rule to be added to the parse rule set 0 in the location shown here:

# resolve locally connected UUCP links
...
        ← New rules added here
# resolve remotely connected UUCP links (if any)

Note that the LOCAL_UUCP mc macro is not intended for casual use. It should be used only to solve special UUCP needs that cannot be solved using more conventional methods.