<div dir="auto">Kevin,<div dir="auto"><br></div><div dir="auto">Correct, which is why it is off initially by default.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Nov 5, 2019, 2:18 PM Kevin Miller via MailScanner <<a href="mailto:mailscanner@lists.mailscanner.info">mailscanner@lists.mailscanner.info</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">That's what I was concerned about. It may be moot, as I'm doing DKIM/DMARC checking in Postfix so hopefully messages will pass or fail DKIM (and hence, be accepted or rejected) prior to MailScanner touching them. Definitely something to watch closely and test before applying it to my production servers...<br>
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...Kevin<br>
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Kevin Miller<br>
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From: MailScanner <mailscanner-bounces+kevin.miller=<a href="mailto:juneau.org@lists.mailscanner.info" target="_blank" rel="noreferrer">juneau.org@lists.mailscanner.info</a>> On Behalf Of Mark Sapiro<br>
Sent: Tuesday, November 5, 2019 10:10 AM<br>
To: <a href="mailto:mailscanner@lists.mailscanner.info" target="_blank" rel="noreferrer">mailscanner@lists.mailscanner.info</a><br>
Subject: Re: MailScanner 5.2.1-1 Released<br>
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On 11/5/19 11:01 AM, Kevin Miller via MailScanner wrote:<br>
> Groovy.<br>
> One quick question: Will the insertation of an "External message warning" affect DKIM/DMARC?<br>
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It will modify the message body which will break any DKIM signature which signs the body (hard to imagine one that doesn't) and thus will cause any DMARC check that relies on DKIM (as opposed to SPF) to fail.<br>
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Mark Sapiro <<a href="mailto:mark@msapiro.net" target="_blank" rel="noreferrer">mark@msapiro.net</a>> The highway is for gamblers,<br>
San Francisco Bay Area, California better use your sense - B. Dylan<br>
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