[Leica] Unable to accept non-standard message format

[postmaster@wdr.com]

Why did your message get bounced?
 
Your message entitled "[Leica] Shadow for the Elmar 50" could not be sent to 
" " as it contained an attachment and was not 
sent in the MIME format.
 
MIME is the industry standard method of sending e-mail messages 
with attachments over the Internet.
 
Your message was sent in the Microsoft TNEF format, which cannot 
be read by the WDR e-mail system.
 
Please either resend your message without an attachment, or 
resend it with an attachment in the MIME format.
 
Tip: If you're using Microsoft Outlook, make sure you aren't 
sending in "rich text" format which can force the use of the TNEF 
format. Please see your e-mail support staff for further 
information.
 
E-mail technical support
Warburg Dillon Read
postmaster@wdr.com

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