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2 Email Address Check Rules and Security

2.1	Level of address check severity


When fml.pl compares From: address and an address in member lists,
fml.pl recognizes the following four addresses as the same one in
default. That is fml.pl checks within three levels from DNS root.

	fukachan@titech.ac.jp
	fukachan@phys.titech.ac.jp
	fukachan@beth.phys.titech.ac.jp
	fukachan@exelion.phys.titech.ac.jp


If you check domains more severely, the levels from DNS root is
controlled by $ADDR_CHECK_MAX. If you check 4 levels, set up

	$ADDR_CHECK_MAX = 4;


If 4, 

	fukachan@phys.titech.ac.jp
	fukachan@beth.phys.titech.ac.jp
	fukachan@exelion.phys.titech.ac.jp


is the same but 

	fukachan@titech.ac.jp


differs from others.


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