1. Check that your mail server is not an open relay<div>2. Monitor connections to your server&#39;s port 25 from within the network. Try wireshark for SMTP traffic<br><br><div class="gmail_quote">On 28 January 2011 13:31, boniface njoroge <span dir="ltr">&lt;<a href="mailto:bonifacenjoroge5@gmail.com">bonifacenjoroge5@gmail.com</a>&gt;</span> wrote:<br>

<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Hi guys our domain was recently blacklisted,the case was that  alot of<br>
spam was coming from our side.Is there a way to know the specific user<br>
that is sending the spam from my networkWe have a corporate anti virus<br>
in this case NOD 32 .Thank you<br>
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