When I telnet to the host, the connection just hang. For example, I telnet to mta.excite.com 25, it just hang, no response but I can receive mail from their site. I hope I could get more idea on analyzing why the problem occured. Yes, I know that the problem seemed to be on my side, but what caused the problem, that I don't know. I hope someone can give my more idea about this. Thanks! Chrisanthy Carlane PPM Department PT. Circlecom Nusantara Indonesia Jakarta Stock Exchange Building, Tower I, Penthouse #31 fl. Jl. Jend. Sudirman kav.53-43 Jakarta 12190 phone:+62-21-5155555 fax:+62-21-5151672 email:[EMAIL PROTECTED]