Sounds like they may have your domain blocked for some reason. You might
try calling the customer's e-mail administrator and see if they have
something configured that is blocking you.

Aloha,

-Ben-
Ben M. Schorr, OneNote-MVP
Roland Schorr & Tower
http://www.rolandschorr.com
Microsoft Outlook FAQ: http://www.factplace.com/outlook.htm

**I apologize but I am unable to respond to direct requests for assistance.
Please post questions and replies here in the newsgroup. Mahalo!

"Capricorn" wrote in message
...
Dear Friend,
I have Exchange2003 Srv. with SP2.
When I send an e-mail to one of my customer, I get the error message
below:

#######################
The following recipient(s) could not be reached:

on 13.02.2006 15:11

You do not have permission to send to this recipient. For
assistance, contact your system administrator.

mail.my_company.COM #5.7.1 smtp;550 5.7.1
... recipient denied, because MX 10
'mail.my_company.com.' [212.xxx.xxx.xxx] for
rejected address saying "Only 0 recipient allowed for sender ''"

#######################


Is there anyone who can help me, please?
Regards,

Capricorn