Frustrated virgin user

I have recently had a long 'support' conversation with virgin.net regarding
an error message I keep getting when sending a "photo email" using Windows
Live Mail. Virgin are my ISP for the internet and I have email addresses with
them ending virgin.net. The error code is reproduced below:
An unknown error has occurred.

Subject 'xxxxxxxxxx'
Server Error: 554
Server Response: 554 5.7.1 Requested action not taken: Message was spam or
contained virus
Server: 'mail.virgin.net'
Windows Live Mail Error ID: 0x800CCC6F
Protocol: SMTP
Port: 25
Secure(SSL): No

In my discussion with virgin support the conclusion was reached that when a
"photo email" is created there is a stage of "preparing photos" before the
email is placed in the outbox. This would appear to be where the problem
occurs in that some code is added to the photograph for it to be identified
when uploaded to the WLM server (this would make sense as the email recipient
would then click on the thumbnail image in the email to download the hi-res
image from the server). It seems that virgin.net & maybe some other ISPs see
this embedded code as possibly malicious and therefore reject the email with
the error message above.
Some work needs to be done here. Has anyone else experienced the same
problem and, more importantly have they resolved the issue.