[SLE] raw mail addresses allowed?

Hi, I have a new server being set up which only has an ip address. I try to send mail to zentara@203.134.23.789 and the mail is returned saying "hostname not found". Is there a special syntax to send to a raw address, or isn't it allowed? Thanks -- To unsubscribe send e-mail to suse-linux-e-unsubscribe@suse.com For additional commands send e-mail to suse-linux-e-help@suse.com Also check the FAQ at http://www.suse.com/support/faq