or download this
Oct 9 14:18:50 localhost postfix/qmgr[4121]: A9D2D1BE8D1: from=<jimk@
+Macintosh.local>, size=5678, nrcpt=1 (queue active)
Oct 9 14:18:50 localhost postfix/qmgr[4121]: C5ADB1BE8C7: from=<jimk@
+Macintosh.local>, size=2377, nrcpt=1 (queue active)
...
Oct 9 14:18:53 localhost postfix/smtp[4389]: 27FFE1BE850: to=<cpan-te
+sters@perl.org>, relay=mx.develooper.com[63.251.223.176], delay=18090
+, status=deferred (host mx.develooper.com[63.251.223.176] said: 450 C
+ould not resolve Macintosh.local (in reply to MAIL FROM command))
Oct 9 14:18:53 localhost postfix/smtp[4393]: A9D2D1BE8D1: to=<cpan-te
+sters@perl.org>, relay=mx.develooper.com[63.251.223.176], delay=6813,
+ status=deferred (host mx.develooper.com[63.251.223.176] said: 450 Co
+uld not resolve Macintosh.local (in reply to MAIL FROM command))
Oct 9 14:18:56 localhost postfix/smtp[4392]: C5ADB1BE8C7: to=<cpan-te
+sters@perl.org>, relay=mx.develooper.com[63.251.223.176], delay=6851,
+ status=deferred (host mx.develooper.com[63.251.223.176] said: 450 Co
+uld not resolve Macintosh.local (in reply to MAIL FROM command))