use strict;
use warnings;

while (<DATA>)
  {
  print "email $2, $3, code $1.\n" if /]: ([a-f0-9]+):.*?said: (\d+) <(.+?)>/i;
  }

##</code><code>##

__DATA__
Jul  6 14:36:41 moe postfix/smtp[15107]: A73DC113B63: to=<oetiker@concentric.com>, relay=adamant.concentric.com[207.155.248.168], delay=17, status=bounced (host adamant.concentric.com[207.155.248.168] said: 554 <oetiker@concentric.com>: Recipient address rejected: Unknown or invalid user oetiker@concentric.com (in reply to RCPT TO command))

email 554, oetiker@concentric.com, code A73DC113B63.