Undelivered Mail Returned to Sender

[Error202]

My English bad, sorry
I`m from Russia...

Every 2-3 min a get 1-2 new message...
-----------
FROM: MAILER-DAEMON@mydomain.ru (Mail Delivery System)
TO: web1_mydomain@mydomain.ru
Subject: Undelivered Mail Returned to Sender
------------
BODY:
This is the mail system at host mydomain.ru.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

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

<admispconfig@localhost.localdomain.ru>: delivery temporarily suspended:
connect to localhost.localdomain.ru[82.98.86.161]: Connection timed out
------------------
ATTACHED: 1.msg
From: My Name <web1_mydomain@mydomain.ru>
To: Empty
Subject: Mailsize: web1_mydomain
Body: 3607
------------------ END
82.98.86.161 - Is not my IP...


I don`t wont recieve this message... How I can delete this on server?
or I need configurating my server correctly?

Sorry for my english... Thanks