Your message did not reach some or all of the intended recipients. Subject: <regular text subject> Sent: 9/19/2008 2:40 PM The following recipient(s) could not be reached: <local Exchange email add> on 9/19/2008 2:40 PM You do not have permission to send to this recipient. For assistance, contact your system administrator. MSEXCH:MSExchangeIS:/DC=edu/DC==<remainder of our domain> <yahoo email add> on 9/19/2008 2:40 PM You do not have permission to send to this recipient. For assistance, contact your system administrator. MSEXCH:MSExchangeIS:/DC=edu/DC=<remainder of our domain> NB: I have replaced parts of the error message and indicated what was there in <> please find message tracking report, All th users are on same server please find message tracking report, All th users are on same serverneeded RCA ... plz help..

hi, According to your error information, i find the similar post. http://social.technet.microsoft.com/Forums/en-US/exchangesvradmin/thread/250f503a-c0b2-413f-8dbb-c4a484933927/ It seems that the error is casued by some third party security software. So if you have some security software on your client or server, please disable it and try again. If you can provide more information about your issue, it is really helpful. hope can help you thanks, CastinLu TechNet Community Support