Doudt on renote domains

[selani]

Hi,

I understand that we need to create remote domains to relay outgoing mails in IIS. But is it necessary that we have to create one remotes domain each for every mail domain.

That is, to send mails to x@yahoo.com, y@rediffmail.com, x@stv.co.en and Y@xxx.zz.com, do i need to create the following 4 remote domains:
1. yahoo.com
2. rediffmail.com
3. stv.co.en
4. xxx.zz.com

Or is it possible to create ONE SINGLE remote domain which will relay mails to the above mentioned IDs?

selani