Yahoo users receive mails in their spam folder

[Sanjit]

Dear Friends
When I am sending mail to any yahoo user, it goes to their spam folder. I have reverse DNS configured still I am getting problem. Would you suggest any solution.
Following is a header file from yahoo account.

Thanks
================================================
Return-Path: <sanjit@aries.res.in>
Authentication-Results: mta200.mail.mud.yahoo.com from=aries.res.in; domainkeys=neutral (no sig); from=aries.res.in; dkim=neutral (no sig)
Received: from 210.212.91.100 (EHLO mail.aries.res.in) (210.212.91.100) by mta200.mail.mud.yahoo.com with SMTP; Mon, 02 Feb 2009 22:55:07 -0800
Received: from localhost (localhost.localdomain [127.0.0.1]) by mail.aries.res.in (Postfix) with ESMTP id DA9DC128BE2 for <sanjit.sahu@yahoo.com>; Tue, 3 Feb 2009 12:24:45 +0530 (IST)
Received: from mail.aries.res.in ([127.0.0.1]) by localhost (mail.aries.res.in [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id shsjgBlZ-ZKe for <sanjit.sahu@yahoo.com>; Tue, 3 Feb 2009 12:24:43 +0530 (IST)
Received: from mail.aries.res.in (mail.aries.res.in [202.141.125.240]) by mail.aries.res.in (Postfix) with ESMTP id 9B311128BE0 for <sanjit.sahu@yahoo.com>; Tue, 3 Feb 2009 12:24:43 +0530 (IST)
Date: Tue, 3 Feb 2009 12:24:42 +0530 (IST)
From:
sanjit@aries.res.in
Add sender to Contacts
To: sanjit <sanjit.sahu@yahoo.com>
Message-ID: <1958178020.471233644082458.JavaMail.root@mail.ari es.res.in>
In-Reply-To: <146840157.221233641813922.JavaMail.root@mail.arie s.res.in>
Subject: Marriage Invitation- Attn:
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="----=_Part_31_1742416238.1233644082456"
Content-Length: 3853637

[phoenix]

According to the test on this page, you have no reverse IP for that domain. You should, however, ask the Yahoo mail support for information on why your mail was marked as spam.

[dfriestedt]

I have the same problem...

Still Cannot Send Emails to Yahoo

for now I'm just accepting it. I can't find a solution, other than relay through a smarthost.