[svlug] Issue with sendmail

[Skip Evans]

Hey all,

One of my clients asked me to write a PHP script to
send an email to the owner of a site on one of
their servers, which I did. The email did not
arrive at the destination, so I began to look into
the matter.

So I tried sending an email from the server
with:

[root at localhost root]# sendmail skip at venomouspenguin.com
This is a test
.
[root at localhost root]#

But what came into /var/log/maillog is:

Apr 27 22:01:59 localhost sendmail[4075]: j3S51suN004075: 
to=skip at venomouspenguin.com, ctladdr=root (0/0), delay=00:00:05, 
xdelay=00:00:00, mailer=relay, pri=30015, relay=[127.0.0.1] [127.0.0.1], 
dsn=2.0.0, stat=Sent (j3S51x2v004077 Message accepted for delivery)
Apr 27 22:02:00 localhost sendmail[4079]: j3S51x2v004077: 
to=<skip at venomouspenguin.com>, ctladdr=<root at localhost.localdomain> 
(0/0), delay=00:00:01, xdelay=00:00:01, mailer=esmtp, pri=30322, 
relay=venomouspenguin.com. [69.51.81.90], dsn=5.6.0, stat=Data format error

I have read many pages via Google on the
Data format error, but have been able to resolve
this.

Any suggestions would be greatly appreciated,
Skip