click on my name and hit "Send this user an email" you'll have more luck getting hold of me quicker... lol i had chip tell me about this "urgent" thread down the pub lastnight... lol
alternatively try
www.google.com:
Tricky looping problem, a contact has the same email address as an Active Directory user. One user is probably using an Alternate Recipient with the same email address as a contact.
SMTP addresses need to be unique to AD objects