>... because you aren't grepping for the right string, nor, apparently, >rejecting for unknown users, but rather just rejecting to "dead" accounts. >ie, harvesting IMail bounces, not IMGate rejects.
from what I see in postfix logs, Imail rejects with: "[a.b.c.d] said: 550 unknown user" so the egrep would be for: egrep -i "\[(a\.b\.c\.d|w\.x\.y\.z)\] said: 550 unknown user" ... but why don't you use reject_unverified_recipient, or check_recipient_maps? Len
