Hello!

One of the mail users have problems sending mails to other domains. Looking
at the logs, they display:

Aug 17 09:49:55 mail postfix/smtpd[24050]: NOQUEUE: reject: RCPT from *****.
technowave.ne.jp[210.150.98.251]: 554 5.7.1 <makoto-****...@asmo.co.jp>:
Relay access denied; from=<noriyuki-***...@yutaka-japan.com>
to=<makoto-****...@asmo.co.jp> proto=SMTP helo=<Y4>

(real emails are hidden)

Other users from the same domain (yutaka-japan.com) are not having problems
with their accounts.

Questions:
1) Why "helo" does not returns a domain name?
    - is that correct / normal?
    - "Y4" is a proxy server?
2) Does this user has "yutaka-japan.com" as mail server in his/her mail
client config?
    - Is there any way to know that?

The normal way which I solve this kind of problem is adding that IP
(210.150.98.251) to mynetworks setting.
But I feel that is not the best way to do it. I would like to know why this
is happening... I have no direct access to user's mail client settings
so I have to assume his/her settings are correct.

Thank you.

A.Lepe

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