DNS problem may be ...

[Essy Ren]

There's a failure notice send to [EMAIL PROTECTED] like this :   Hi. This is the qmail-send program at sanfransisco.erakarsa.local. I'm afraid I wasn't able to deliver your message to the following addresses. This is a permanent error; I've given up. Sorry it didn't work out. <[EMAIL PROTECTED]>: Sorry, I couldn't find a mail exchanger or IP address. (#5.4.4) I want to use [EMAIL PROTECTED] to send and receive mail rather than sanfransisco.erakarsa.local Where's the change I've should make to make it work ...???