Hi
my test email receive a lot of mail delivery system. how can fix this? it's looks like spam.

From: Mail Delivery System <MAILER-DAEMON@<hide>>
Date: Mon, Aug 25, 2014 at 3:12 PM
Subject: Delayed Mail (still being retried)
To: test@<hide>


This is the mail system at host <hide>.

####################################################################
# THIS IS A WARNING ONLY.  YOU DO NOT NEED TO RESEND YOUR MESSAGE. #
####################################################################

Your message could not be delivered for more than 4 hour(s).
It will be retried until it is 5 day(s) old.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

                   The mail system

<www.rajitpandey@yahoo.com>: delivery temporarily suspended: lost connection
    with mta7.am0.yahoodns.net[98.138.112.35] while sending RCPT TO

Final-Recipient: rfc822; www.rajitpandey@yahoo.com
Original-Recipient: rfc822;www.rajitpandey@yahoo.com
Action: delayed
Status: 4.4.2
Diagnostic-Code: X-Postfix; delivery temporarily suspended: lost connection
    with mta7.am0.yahoodns.net[98.138.112.35] while sending RCPT TO
Will-Retry-Until: Fri, 29 Aug 2014 22:24:04 -0400 (EDT)