Am 21.06.2015 um 17:00 schrieb Jeroen de Neef:
I wonder what their justification is for doing this.

the questoon is how many addtional IP's on the /24 where in fact sending spam, see http://www.spamhaus.org/faq/section/Glossary#233

2015-06-21 16:33 GMT+02:00 Jered Floyd <je...@convivian.com
<mailto:je...@convivian.com>>:

    Richard,

     > The BRBL may have listed the entire  /24 that includes your
    sending IPs.
     > Painful experience has shown that Barracuda won't hear your
    requests for
     > delisting, and the listing may never go away.

    I believe you've got it in one.  I heard back from a colleague on
    the same /24 (though not the same address!) and he had a client with
    a bad WordPress install that was generating spam.

    That seems to make this EmailReg situation even more egregious -- if
    they're really blocking whole networks based on a single IP then it
    really is a protection scheme operated (opaquely) by Barracuda.
    "Pay us money if you want mail to get through to our customers;
    we'll blacklist you arbitrarily otherwise."  How can this possibly
    be legal under US racketeering laws?

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