What additional security issues does an MTA and email client face if a catch-all email address is setup on an sub-domain (that isn't published/publicly listed anywhere) compared with setting up individual email forwarders to the same address (as needed). Stakeholders are administrator of MTA and email user.
closed as not a real question by Michael Hampton, EEAA, John Gardeniers, HopelessN00b, mailq Sep 25 '12 at 21:53
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I don't know why you'd want to set up a spam collector, but that's really all a catch-all email address will do. No security risk, so long as you have an anti-spam/email security solution in place and/or the users know better than to open