i have a one scenario, May main office in kuwait and my domain is example abckuwait.com and one is US abcus.com and one is UK abcuk.com. My physical domain and exchange 2010 sp1 is located in kuwait name is abckuwait.com. if i add 2 accepted domain one for abcus.com and one for abcuk.com. Does it work ? and my US and UK users will able to send and received email through webmail or pop3? example email@example.com , firstname.lastname@example.org , email@example.com. or is there any more setting required? And one more thing i have registered domain on web abckuwait.com, abcus.com and abcuk.com is there any setting on the registered domain required?