Message-ID: <58501C8A.1060204@yahoo.com>
Date: Tue, 13 Dec 2016 17:06:34 +0100
From: Some Body <XXXXXX@yahoo.com>
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To: postmaster@mydivision.myorg.tld
Subject: You blocked my emails
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Welcome dear Master,

If you further block my emails, then I guaratee you that all email 
addresses with wich I have at your University and Research Institutes - 
will be blocked for 3 months in the Spamhaus. I only shall to send with 
these addresses iframe and remote script links in the body of the 
emails. You still have 2 days.

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A message that you sent could not be delivered to one or more of its
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   a.user@myorg.tld
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     host mailrelay.provider.tld [XXX.XXX.XXX.XXX]: 554 5.7.0 Reject, id=06254-02 - spam