Undelivered Mail Returned to Sender

[Mail Delivery System]

This is the mail system at host relay2.interno.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
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                   The mail system

<info at interno.ru>: host 127.0.0.1[127.0.0.1] said: 550 5.7.1 Message rejected
    (This message has been rejected by spam filtering engine.) (in reply to end
    of DATA command)
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From: =?windows-1251?B?wOvl6vHl6Q==?= <pkg-exim4-maintainers at lists.alioth.debian.org>
Subject: ????????! ???? ??? ??????????? ! ???????? !
Date: Thu, 29 Sep 2011 10:00:32 +0400
Size: 4476
URL: <http://lists.alioth.debian.org/pipermail/pkg-exim4-maintainers/attachments/20110929/b90d4314/attachment-0001.mht>