^\w{3} [ :0-9]{11} [._[:alnum:]-]+ postfix/smtpd\[[0-9]+\]: [[:upper:]0-9]+: reject: RCPT from [^[:space:]]+: [45][0-9][0-9] [0-9]\.[0-9]\.[0-9] <[^[:space:]]+>: Client host rejected: Greylisted for [0-9]+ seconds \(see http://isg.ee.ethz.ch/tools/postgrey/help/[._[:alnum:]-]+\); from=<[^[:space:]]*> to=<[^[:space:]]+> proto=(ESMTP|SMTP) helo=<[^[:space:]]+>$