MSN admins Mails disappears into ether

[Elijah Savage <esavage () digitalrage org>]

Is there any MSN admins on the list that can help. We have a customer 
that sends mail to an msn account and sometimes it goes and sometimes it 
does not and they are getting very frustrated with our service of course 
blaming us. I have logs that show we sent the mail and it was accepted 
for delivery but the person on the other end never gets it. This 
customer can send the same mail 5 minutes apart for testing and we show 
it being delivered and accepted both times but the guy on the other end 
will get 1 out of the 2 messages so we do not think it is being marked 
as spam on your end and dropped. If anyone can please contact me off 
list or if anyone has had any success with contacting a MSN admin that 
info would be greatly appreciated.
Thank you
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