i've already registered domain to internic (example abc.com) for mailing. and i used site connector in exchange5.5 sp4 and winNT sp6 to connect another exchange site. in headquarter i use abc.com (site addressing) and the other site i use h1.abc.com and h2.abc.com . can i use those sites of h1.abc.com and h2.abc.com (internet mail) without registering to internic? so everyone can send email to user@xxxxxxxxxx , etc. from hotmail or yahoo or another ISP, or i have to register it (h1.abc.com and h2.abc.com) ?.... any comments would be appreciated... Regards; Amos D. Galiardo