Is it possible to send an email address to an ip address? The reason i want to do this is because I want to test out the postfix server before actually getting our domain name to point to it.

edit /etc/hosts to point to the new IP

doesn't work

I have access to 2 postfix servers, lets call them postfix1 and postfix2. postfix1 is live and has a domain pointing to the external ip of that server. I'm setting up postfix2 and as far as I can tell its working but I want to be sure of it by trying to send an email from a different smtp server to it. Yun.com is, I believe, not a valid domain name. So in the /etc/hosts files of postfix1 I set yun.com to an ip. And when i use postfix1 to send an email to yun.com it tries to send it to jay.yun.co.jp for some unknown reason. I guess it doesn't even read the hosts file.

Registrant:
Yun Factory domain-admin@yun.co.jp +81.353683790
Yun Factory
3-1-24-5F Shinjuku
Shinjuku-ku,Tokyo,JP 160-0022


Domain Name:yun.com
Record last updated at 2004-06-09 06:38:25
Record created on 1996/4/10
Record expired on 2007/4/10

ok, good point I just tried with pauldaewonyun.com with the /etc/hosts file modified accordingly and still no luck. I get a response back from postfix1 saying

<paulyun@pauldaewonyun.com>: Host or domain name not found. Name service error
for name=pauldaewonyun.com type=A: Host not found

it looks like postfix never looks at the hosts file to resolve a name