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Implement SPF check on my Trend Micro IMSVA but a spam mail come through with status &quot;Neutral&quot;. Is it possible to tune the config.ini file to block this type of email ?<br />
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Received-SPF: Neutral (as1.abc.com: 207.210.xxx.1xxx is neither permitted nor denied by domain of xxxxx@yahoo.com) identity=MAILFROM; client-ip=207.210.xx.xx; envelope-from=xxxx@yahoo.c<wbr />om; helo=server.xxxx.com)<br />
Received: from server.xxx.com (unknown [207.210.xx.xx]) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;by<br />
&nbsp;as1.abc.com (Postfix) with ESMTPS &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;for<br />
&nbsp;&lt;enquiry@abc.com&gt;; Mon, 24 Apr 2017 22:21:31 +0800 (HKT)<br />
Received: from xxx.hostwindsdns.com ([104.168.xx.xx]:57942<br />
&nbsp;helo=yahoo.com) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;by server.xxx.com with esmtpsa<br />
&nbsp;(TLSv1:ECDHE-RSA-RC4-SHA:1<wbr />28) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(Exim 4.89) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(envelope-from<br />
&nbsp;&lt;xxxx@yahoo.com&gt;) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;id 1d2ero-0008KH-Io<br />
<a href="https://filedb.experts-exchange.com/incoming/2017/04_w17/1158311/C--temp-SOP_IMSVA_9.0_SPF.PDF" target="_blank" class="file-inline" title="SOP IMSVA (795 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>C--temp-SOP_IMSVA_9.0_SPF.PDF</a>
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C--temp-SOP_IMSVA_9.0_SPF.PDF

Implement SPF check on my Trend Micro IMSVA but a spam mail come through with status "Neutral". Is it possible to tune the config.ini file to block this type of email ?


Received-SPF: Neutral (as1.abc.com: 207.210.xxx.1xxx is neither permitted nor denied by domain of xxxxx@yahoo.com) identity=MAILFROM; client-ip=207.210.xx.xx; envelope-from=xxxx@yahoo.com; helo=server.xxxx.com)
Received: from server.xxx.com (unknown [207.210.xx.xx])	by
 as1.abc.com (Postfix) with ESMTPS	for
 <enquiry@abc.com>; Mon, 24 Apr 2017 22:21:31 +0800 (HKT)
Received: from xxx.hostwindsdns.com ([104.168.xx.xx]:57942
 helo=yahoo.com)	by server.xxx.com with esmtpsa
 (TLSv1:ECDHE-RSA-RC4-SHA:128)	(Exim 4.89)	(envelope-from
 <xxxx@yahoo.com>)	id 1d2ero-0008KH-Io

Configure SPF check on IMSVA

Various techniques are used to prevent email spam (unsolicited bulk email). No technique is a complete solution to the spam problem, and each has trade-offs between incorrectly rejecting legitimate email (false positives) vs. not rejecting all spam (false negatives) - and the associated costs in time and effort. Anti-spam techniques can be broken into four broad categories: those that require actions by individuals, those that can be automated by email administrators, those that can be automated by email senders and those employed by researchers and law enforcement officials.

AntiSpam

Interactions between email servers and clients are governed by email protocols. The three most common email protocols are POP, IMAP and MAPI. Most email software operates under one of these (and many products support more than one).  The correct protocol must be selected, and correctly configured, if you want your email account to work.