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    I prefer to query my domain controllers for the list of valid
    recipients, and use this attached script to do so.&nbsp; It also pages
    through the response from Active Directory (pulls 990 items) so you
    get all valid user emails.&nbsp; There is no mention of an AD domain, so
    even if this doesn't help Tracy, it may help others.<br>
    <br>
    Cheers,<br>
    <br>
    Michael Huntley<br>
    @huntley<br>
    <br>
    <div class="moz-cite-prefix">On 7/30/2014 5:59 AM, Alex Neuman
      wrote:<br>
    </div>
    <blockquote
cite="mid:CANyE0PqZ64cUouBE5+KTu1gucbddjX56_qSUHjGVrbQu0agE6Q@mail.gmail.com"
      type="cite">
      <div dir="ltr">You could, at least in theory, use plugins to check
        recipients using LDAP in Active Directory - this plus proper SPF
        implementation reduces a lot of the fake "from" and bogus "to"
        addresses for your domain.<img moz-do-not-send="true"
          src="http://www.mailscanner.tv/1x1spacer.gif" alt="Web Bug
          from
http://t.sigopn05.com/img.gif?ukey=agxzfnNpZ25hbHNjcnhyGAsSC1VzZXJQcm9maWxlGICAgKCUyroKDA&amp;key=e5ffd452-112a-466f-a727-8f104a0adba7"
          height="1" width="1"></div>
      <div class="gmail_extra"><br clear="all">
        <div>
          <div dir="ltr">
            <div style="font-family:arial;font-size:small">
              <div><br>
                <b>Alex Neuman van der Hans<br>
                </b>Reliant Technologies / Vida Digital<br>
                <a moz-do-not-send="true"
                  href="http://vidadigital.com.pa/"
                  style="color:rgb(17,85,204)" target="_blank">http://vidadigital.com.pa/</a><br>
                <br>
              </div>
              <div>Mobile: +507-6781-9505<br>
                Work: +507-832-6725<br>
                Work (USA): +1-440-253-9789</div>
              <div>Skype: <a moz-do-not-send="true">AlexNeuman</a></div>
              <div><br>
                Don't miss <a moz-do-not-send="true"
                  href="http://new.livestream.com/accounts/5061819"
                  target="_blank">Vida Digital on LiveStream</a>!</div>
              <div>Saturdays 8am-10am on 104.3FM Panama</div>
              <div><br>
                Follow&nbsp;<b><a moz-do-not-send="true"
                    href="https://twitter.com/alexneuman"
                    style="color:rgb(17,85,204)" target="_blank">@AlexNeuman</a></b>&nbsp;on
                Twitter<br>
                Like&nbsp;<a moz-do-not-send="true"
                  href="https://facebook.com/vidadigital/"
                  style="color:rgb(17,85,204)" target="_blank">Vida
                  Digital</a>&nbsp;on Facebook</div>
            </div>
            <div style="font-family:arial;font-size:small">Follow&nbsp;<a
                moz-do-not-send="true"
                href="http://instagram.com/vidadigital"
                style="color:rgb(17,85,204)" target="_blank">VidaDigital</a>&nbsp;on
              Instagram</div>
            <div style="font-family:arial;font-size:small">
              Subscribe to&nbsp;<a moz-do-not-send="true"
                href="https://youtube.com/reliantpty"
                style="color:rgb(17,85,204)" target="_blank">Vida
                Digital</a>&nbsp;on Youtube</div>
          </div>
        </div>
        <br>
        <br>
        <div class="gmail_quote">On Tue, Jul 29, 2014 at 3:06 PM, Tracy
          Greggs <span dir="ltr">&lt;<a moz-do-not-send="true"
              href="mailto:mailscanner-list@okla.com" target="_blank">mailscanner-list@okla.com</a>&gt;</span>
          wrote:<br>
          <blockquote class="gmail_quote" style="margin:0 0 0
            .8ex;border-left:1px #ccc solid;padding-left:1ex">
            <div link="#0563C1" vlink="#954F72" lang="EN-US">
              <div>
                <p class="MsoNormal"><span style="color:#1f497d">BTW,
                    Exchange 2013 does not have recipient checking
                    integrated into their antispam feature set.&nbsp; This
                    has proven to be a real PITA when using MailScanner
                    as a gateway.&nbsp; Another brilliant move from
                    Microsoft!</span></p>
                <p class="MsoNormal"><span style="color:#1f497d">&nbsp;</span></p>
                <p class="MsoNormal"><span style="color:#1f497d">Regards</span></p>
                <p class="MsoNormal"><span style="color:#1f497d">&nbsp;</span></p>
                <p class="MsoNormal"><span style="color:#1f497d">&nbsp;</span></p>
                <div>
                  <div style="border:none;border-top:solid #b5c4df
                    1.0pt;padding:3.0pt 0in 0in 0in">
                    <p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span
style="font-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;">
                        <a moz-do-not-send="true"
                          href="mailto:mailscanner-bounces@lists.mailscanner.info"
                          target="_blank">mailscanner-bounces@lists.mailscanner.info</a>
                        [mailto:<a moz-do-not-send="true"
                          href="mailto:mailscanner-bounces@lists.mailscanner.info"
                          target="_blank">mailscanner-bounces@lists.mailscanner.info</a>]
                        <b>On Behalf Of </b>Tracy Greggs<br>
                        <b>Sent:</b> Tuesday, July 29, 2014 1:48 PM<br>
                        <b>To:</b> 'MailScanner discussion'<br>
                        <b>Subject:</b> RE: New to MailScanner</span></p>
                  </div>
                </div>
                <p class="MsoNormal">&nbsp;</p>
                <p class="MsoNormal">
                  <span style="color:#1f497d">I use sendmail, so someone
                    else can comment on your postfix question.</span></p>
                <p class="MsoNormal"><span style="color:#1f497d">&nbsp;</span></p>
                <p class="MsoNormal"><span style="color:#1f497d">I would
                    make a suggestion to turn on the Exchange antispam
                    feature for recipient checking and run MILTER-AHEAD
                    with your MailScanner MTA.&nbsp; It is cheap but not
                    free, but well worth the expense.</span></p>
                <p class="MsoNormal"><span style="color:#1f497d">&nbsp;</span></p>
                <p class="MsoNormal"><span style="color:#1f497d">Regards,</span></p>
                <p class="MsoNormal"><span style="color:#1f497d">Tracy
                    Greggs</span></p>
                <p class="MsoNormal"><span style="color:#1f497d">&nbsp;</span></p>
                <p class="MsoNormal"><span style="color:#1f497d">&nbsp;</span></p>
                <div>
                  <div style="border:none;border-top:solid #b5c4df
                    1.0pt;padding:3.0pt 0in 0in 0in">
                    <p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span
style="font-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;">
                        <a moz-do-not-send="true"
                          href="mailto:mailscanner-bounces@lists.mailscanner.info"
                          target="_blank">mailscanner-bounces@lists.mailscanner.info</a>
                        [<a moz-do-not-send="true"
                          href="mailto:mailscanner-bounces@lists.mailscanner.info"
                          target="_blank">mailto:mailscanner-bounces@lists.mailscanner.info</a>]
                        <b>On Behalf Of </b>Greg Ledford<br>
                        <b>Sent:</b> Tuesday, July 29, 2014 10:49 AM<br>
                        <b>To:</b> '<a moz-do-not-send="true"
                          href="mailto:mailscanner@lists.mailscanner.info"
                          target="_blank">mailscanner@lists.mailscanner.info</a>'<br>
                        <b>Subject:</b> New to MailScanner</span></p>
                  </div>
                </div>
                <p class="MsoNormal">&nbsp;</p>
                <p class="MsoNormal">Hello. Please be kind as I&#8217;m still
                  learning the program and I&#8217;ll have lots of questions.
                  Is there a webpage that lists the instructions to
                  install MailScanner + Postfix if you are using it as a
                  front-end for an Exchange 2010 server? Thanks for any
                  help you can provide.</p>
                <p class="MsoNormal">&nbsp;</p>
                <p class="MsoNormal"><span style="color:black"><br>
                  </span><b><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">Greg
                      Ledford</span></b><span style="color:black"><br>
                  </span><b><u><span style="color:#323e4f">PHHW
                        Technology Services LLC</span></u></b><span
                    style="color:black"><br>
                    1000 Corporate Centre Dr, Ste 200<br>
                    Franklin, TN 37067<br>
                    Office <a moz-do-not-send="true"
                      href="tel:%28615%29%20778-1777"
                      value="+16157781777" target="_blank">(615)
                      778-1777</a><br>
                    Cell <a moz-do-not-send="true"
                      href="tel:%28615%29%20403-6989"
                      value="+16154036989" target="_blank">(615)
                      403-6989</a></span></p>
                <p class="MsoNormal"><span style="color:black">Fax <a
                      moz-do-not-send="true"
                      href="tel:%28615%29%20771-0081"
                      value="+16157710081" target="_blank">(615)
                      771-0081</a><br>
                    Email <a moz-do-not-send="true"
                      href="mailto:gledford@phhwtechnology.com"
                      target="_blank"><span style="color:blue">gledford@phhwtechnology.com</span></a></span></p>
                <p class="MsoNormal">&nbsp;</p>
                <p class="MsoNormal"><span
                    style="font-size:12.0pt;font-family:&quot;Times New
                    Roman&quot;,&quot;serif&quot;"><br>
                    -- <br>
                    This message has been scanned for viruses and <br>
                    dangerous content by <a moz-do-not-send="true"
                      href="http://www.mailscanner.info/"
                      target="_blank"><b>MailScanner</b></a>, and is <br>
                    believed to be clean. <span class="HOEnZb"></span></span></p>
                <span class="HOEnZb"><font color="#888888">
                    <p class="MsoNormal"><span
                        style="font-size:12.0pt;font-family:&quot;Times
                        New Roman&quot;,&quot;serif&quot;"><br>
                        -- <br>
                        This message has been scanned for viruses and <br>
                        dangerous content by <a moz-do-not-send="true"
                          href="http://www.mailscanner.info/"
                          target="_blank"><b>MailScanner</b></a>, and is
                        <br>
                        believed to be clean. </span></p>
                  </font></span></div>
              <span class="HOEnZb"><font color="#888888"><br>
                  -- <br>
                  This message has been scanned for viruses and
                  <br>
                  dangerous content by
                  <a moz-do-not-send="true"
                    href="http://www.mailscanner.info/" target="_blank"><b>MailScanner</b></a>,
                  and is
                  <br>
                  believed to be clean.
                </font></span></div>
            <br>
            --<br>
            MailScanner mailing list<br>
            <a moz-do-not-send="true"
              href="mailto:mailscanner@lists.mailscanner.info">mailscanner@lists.mailscanner.info</a><br>
            <a moz-do-not-send="true"
              href="http://lists.mailscanner.info/mailman/listinfo/mailscanner"
              target="_blank">http://lists.mailscanner.info/mailman/listinfo/mailscanner</a><br>
            <br>
            Before posting, read <a moz-do-not-send="true"
              href="http://wiki.mailscanner.info/posting"
              target="_blank">http://wiki.mailscanner.info/posting</a><br>
            <br>
            Support MailScanner development - buy the book off the
            website!<br>
            <br>
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