Thanks Delphinus. I've just changed to SS v2.2.2-rc5 and the problem is still there. I think I'll change my avatar image to have a sad face.

Have you tried doing a clean install of silverstripe then ecommerce?

Virgin install of SS v2.2.2-rc5 and Ecom v0.5.2-rc1 and the same problem. The order is generated and the are emails sent but both emails arrive without content.

Interestingly, and I don't know if it is related, the email header contains the following -

"Sun-Java-System-SMTP-Warning: Lines longer than SMTP allows found and truncated."

Have just tested my own clean install of Silverstripe 2.2.2 (final relase came out today) and ecommerce 0.5.2rc1 and emails worked fine for me. nothing like that in header. Can you paste more of the header for us?

Entire header as below. Note the email address has been changed to protect the innocent. Well, mostly innocent.

Return-Path: <email@email.co.nz>
X-Original-To: email@email.co.nz
Delivered-To: postmaster@email.co.nz
Received: from smtp5.clear.net.nz (smtp5.clear.net.nz [203.97.33.68])
by shoyu.ecosm.com (Postfix) with ESMTP id 0682B8E4481
for <email@email.co.nz>; Thu, 22 May 2008 08:20:25 +0000 (UTC)
Received: from fish (120-72-248-234.cable.telstraclear.net [120.72.248.234])
by smtp5.clear.net.nz (CLEAR Net Mail)
with SMTP id <0K1900NR4GHH4T00@smtp5.clear.net.nz> for
email@email.co.nz; Thu, 22 May 2008 20:20:06 +1200 (NZST)
Date: Thu, 22 May 2008 20:20:10 +1200
From: email@email.co.nz
Subject: User of the site has submitted an order
To: email@email.co.nz
Message-id: <0K1900NR5GHH4T00@smtp5.clear.net.nz>
MIME-version: 1.0
X-Mailer: SilverStripe Mailer - version 2006.06.21 (Sent from "localhost:3000")
Content-type: multipart/alternative;
boundary="Boundary_(ID_K+GWM6DljA7u6ZVZOQmJ4Q)"
X-Priority: 3
Sun-Java-System-SMTP-Warning: Lines longer than SMTP allows found and truncated.
X-SilverStripeBounceURL: localhost:3000/Email_BounceHandler
X-SilverStripeSite: mysite

Enjoy.

And no actual content even in the source?
What mail client are you using?
Which hosting provider?