[Mailman-Developers] Opening up a few can o' worms here...

[Barry A. Warsaw]

>>>>> "JCL" == J C Lawrence <claw@kanga.nu> writes:

    JCL> Nothing.  BUT, if the addresses are date limited the number
    JCL> of addresses in the valid pool is going to tend to be small
    JCL> (ie number of posters within the last window).  This perforce
    JCL> forces SPAM harvesters to constant updating of their lists
    JCL> and a resultant huge rate of bad addresses.

Plus, if you do server alias replacement, you have another technique
at your disposal -- you can quarantine messages for some amount of
time and watch for multiple copies to your aliases.  List admins would
be able to move the lever between more immediate delivery and longer
quarantines as an anti-spam device.

-Barry