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push @myhosts, 'mymail01'; push @myhosts, 'mymail02'; ... } untie %hash;
bucket: aa type: spam 2012-07-07 20120707T204829 spam-aa0b162b5118763a9f053d1412f9f0b1-20120705T082627-27218-15.gz not +defined Use of uninitialized value within %hash in concatenation (.) or string + at ./list_hash.pl line 66.