optimisation; no need for mass-check to even open mail files that have a modtime older than the --after date
optimisation; no need for mass-check to even open mail files that have a modtime older than the --after date

git-svn-id: e9fe9b84e32fc5e57b7d09c40cd78b14ea28ed71@464598 13f79535-47bb-0310-9956-ffa450edef68

apache/spamassassin,apache/spamassassin,apache/spamassassin,apache/spamassassin,apache/spamassassin