Hi all Here is the picture I got some users on sendmail and some on exchange 5.5 the users that's on exchange I created virtual addresses that reroutes any mail that's intentionally sent from a sendmail user box to a user on exchange. I have done the same on exchange were I created a custom recipient for every user that's on sendmail this way the sendmail users can email the exchange users and visa versa how ever. The users in sendmail can not always send mail to the outside world as they seem to get a error stating the following: Your message did not reach some or all of the intended recipients. Subject: FW: ??? Sent: 27/08/02 03:34 PM The following recipient(s) could not be reached: 'USER@mail.pentech.az.za' on 27/08/02 03:34 PM No transport provider was available for delivery to this recipient. Has any one had this errors before and if so how can I fix it?.. The users are all on outlook 97. Regards, Thomas Wheeler -=No Trees Were Harmed By Sending This Email, Only A Few Electrons Were Seriously Discomforted =-