cron job errors

I followed the instructions over at Wiki to set up my email blogging and it worked.

My email post would only show up when I execute the wp-mail.php manually.

I tried to set up cron jobs to do it by typing:

curl http://mydomain.com/wp/wp-mail.php

and got the following error instead:
—
From: root@thyme.***.com (Cron Daemon)
Date: 2005-01-20 20:02:11
Date GMT: 2005-01-20 17:02:11
Category: 13
Subject: Cron ***@thyme> curl http://mydomain.com/wp/wp-mail.php
Posted content:
% Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 852 0 852 0 0 3711 0 –:–:– –:–:– –:–:– 3711 100 852 0 852 0 0 3709 0 –:–:– –:–:– –:–:– 0 Mission complete, message 1 deleted.<b>From</b>: root@thyme.***.com (Cron Daemon)
<b>Date</b>: 2005-01-20 20:00:00
<b>Date GMT</b>: 2005-01-20 17:00:00
<b>Category</b>: 13
<b>Subject</b>: Cron <***@thyme> wget http://mydomain.com/wp/wp-mail.php
<b>Posted content:</b><hr />–11:55:00– http://mydomain.com/wp/wp-mail.php => wp-mail.php.5' Resolving mydomain.com... done. Connecting to mydomain.com[216.180.***.**]:80... connected. HTTP request sent, awaiting response... 200 OK Length: unspecified [text/html] 0K 38.09 KB/s 11:55:00 (38.09 KB/s) - wp-mail.php.5′ saved [39] <hr /><h1>Invalid sender: root@thyme.***.com (Cron Daemon) !</h1><h2>Not adding email!</h2>
Invalid sender: root@thyme.***.com (Cron Daemon) !
Not adding email!
—

does anyone know what’s the problem? Earlier on I tried wget and got similar errors too…

I am using John Blade’s wp-mail mod.