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Questions tagged [dmarc]

DMARC, (Domain-based Message Authentication, Reporting & Conformance), is a technical specification standardizing how email receivers perform email authentication using the well-known SPF and DKIM mechanisms.

DMARC, (Domain-based Message Authentication, Reporting & Conformance), is a technical specification standardizing how email receivers perform email authentication using the well-known SPF and DKIM mechanisms.

http://www.dmarc.org/

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BIND DKIM syntax error

I'm trying to implement DKIM in the DNS zone file. I'm encountering a "Syntax Error" when the following entry is added to the zone file of the domain: 201803._domainkey IN TXT “v=DKIM1; h=sha256; k=rsa; s=email…
JinKazama
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Email phishing detection issue on GoDaddy / mailgun can it be connected with DMARC?

Some email clients consider our emails as a phishing (in Office 365). The only thing that was missing based on the https://mxtoolbox.com/SuperTool.aspx?action=mx was DMARC entry missing. I've added TXT DNS record like this (TTL…
poslinski.net
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DMARC reports: why Google submitting the reports?

I configured DMARC in an email gateway solution and received the DMARC reports. My question is: why Google submitting the reports?
daviknx
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Mail configuration in Plesk - DKIM, DMARC, SPF, DNS Records

I am using Plesk (Onyx) in combination with external DNS. I configured mail and everything seems to be ok, but I am not sure if my mail configuration is correct, because sometimes a DMARC-report states, that a SPF / DKIM verification did not…
koseduhemak
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Postmaster SPF FAILing/Email headers show PASS

I'm using a domain (say xyz.com) to send marketing mails. We've done SPF/DKIM/DMARC authentication and we see the same in the email body (show original option in gmail)- SPF PASS DKIM PASS but the same domain in postmaster shows 100% DKIM, 0% DMARC,…
yash
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Authentication-Results - DKIM - change header

If I send emails from my server I got the following headers: Delivered-To: targetemail@gmail.com Received: by 10.31.231.70 with SMTP id e67csp768117vkh; Wed, 20 Sep 2017 08:12:10 -0700 (PDT) X-Google-Smtp-Source:…
koseduhemak
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Unexpected DMARC failure

I have a DMARC failure case that I can't understand. DKIM is not in place, my DNS entires are the following MX mymailserver.com IP_adress_of_my_email_server TXT mydomain.com v=spf1 mx ~all TXT _dmarc.mydomain.com v=DMARC1; rua=myemailadress;…
N Remarck
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Firebase Dynamic Link DMARC Error Android

I have been using Firebase Dynamic Links in my app for users to send email invites to other users. However, a user reported that using a Yahoo! email blocks her email invites with this error: 550 5.7.1 unauthenticated email from yahoo.com is not…
Dale Julian
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Unable to send Emails to university email addresses

I use dnsimple to host my DNS and have valid SPF, DKIM, and DMARC records to validate my emails sent from Zoho. However, Whenever I send emails to an @ucdavis.edu account I get an Undelivered Mail response This message was created automatically by…
Bevilacqua
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Checking SPF, DKIM, DMARC programmatically

I have a small program designed to check the existence of these three mail records to counter spoofing. It seems to work on specific domains however they seem to be setup in a case by case basis. My question is whats a more robust way to check…
amlwwalker
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Is the PTR for a mail server using DMARC, SPF, and DKIM only needed on the one main computer with the actual mail server?

We have a website that runs on 6 computers in a cluster. So any one of the computers can be accessed using that domain name such as: http://example.com/ On top of that, we have a 7th computer that is used for sending emails with postfix. That mail…
Alexis Wilke
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DMARC DKIM Alignment

I created a mail server with debian 8 and iRedMail that works perfectly. The mail server runs 5 virtual domains and is configured with SPF, DKIM and DMARC I receive correctly DMARC report for mails sent from the machine and everything is aligned. I…
Vincenzo
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What to do about spam emails already rejected by DMARC?

I currently have DMARC implemented for my email domain. My underlying email is gmail. Each week, I receive a report stating that the emails I send are fully aligned (between 50 and 200 from known domains like AWS or google). But for many months…
Chris Jones
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DMARC Validates DKIM failed

DMARC validates DKIM result as failed :( When im sending mails to GMAIL my DMARC report always returns the respond from the screenshot. I have already tried multiple validation tests to check my SPF and DKIM i cant see the problem. When im sending…
Michael Tonnisen
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PHPMailer and DKIM Failing Miserably

I hope somebody can help me as I've been pulling my hair out and burning the candle at both ends for over a week now! Ok, before anyone says anything, yes I will show all passwords and DKIM strings, I'm going to drop this domain once I get things…
Shaun0517
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