My mail server is exchange 2000. I applied exchange sp#1 lately. But I have a problem...that is like this. I can't send to yahoo.com(and yahoo.co.kr) and the other domain is OK. and all message for yahoo.com is queued.. Anybody Know this sympthon?? =============================== (주)코리아닷컴 커뮤니케이션즈 시스템실 / 대리 / MCSE ☎ 02-3488-8437 011-9913-7463 E-Mail:jsyoon@xxxxxxxxxxxxxx