Okay I found something out...I can get mail in hotmail when i address to multiple people in a field like to or cc but ONLY as long as the hotmail address is not last and here is why.
I found in AOL mail & hotmail looking at the headers of message's sent from my ISPConfig's webmail that it is putting quotes and @domain.com added to the end of the last email address in the address field.
here is an example of one that i got in hotmail because the hotmail address was not the last address:
From : Shane O'Neill <shane@*******.com>
Reply-To : "Shane O'Neill" <shane@*******.com>
Sent : Tuesday, April 18, 2006 5:13 AM
TO: *****@hotmail.com, "*****@aim.com"@on****cs.com
Subject : webmail sent tuesday! test 2
If you notice in bold it puts in quotes and adds my servers domain to the last address.
What is causing this???