Who could be of assistance? In my environment, I have exchange server 2003 running on SBS server 2003 but we cannot send mails to yahoo users unless the user has his Buk mail activated. Atimes the recipein will not get the mail at all even with his bulk folder activated. Generally, sending mails to public addresses like yahoo takes time to leave the exchange server. We cannot send to virtually most mail servers outside our organisation but we can send to our ISP. We are able to recieve mails from any mail server and we can easily send and recieve mails within our organisation. I hope someone could help me resolve this issue.