#DMARC
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bearstech.com
Comprendre SPF, DKIM, DMARC (P)

Une analyse visuelle de la façon dont les serveurs de messagerie communiquent, vous donnant une meilleure compréhension de SPF, DKIM et DMARC et de la façon dont ils fonctionnent ensemble.

👉 learndmarc.com
Welcome to the "Learn and Test DMARC" console! Here, you'll get a visual breakdown of how email servers communicate, giving you a better understanding of SPF, DKIM, and DMARC and how they work together. Send an email to this address to get started: ld-eff92e15a5@learndmarc.com Other options: > Spoof my email > Load random example > Test your DMARC knowledge > Paste email headers > Listen to our podcast << NEW! Don't worry, we only use your email to check your DMARC setup. We don't store any of your data. Waiting for incoming email...
April 9, 2025 at 6:11 PM
boner.dad
lol nobody at my company would even see this shit if it fails dmarc (which is basically dkim + spf and is the very basic 'im not spam' signifier in 2025)
chadloder.dev Chad Loder @chadloder.dev · Feb 22
DOGE has been sending their mass emails from a misconfigured server, causing DOGE emails to fail SPF (Sender Policy Framework) validation.

This means that agencies are probably marking DOGE emails as spam.
davelevitan.bsky.social Dave Levitan @davelevitan.bsky.social · Feb 22
I am hearing from gov employees who got the OPM email but won't open it because it seems so shady. Things are going great.
February 22, 2025 at 10:32 PM
ransomwaresommelier.com
Ohhh…on this week’s @smashingsecurity.com podcast @grahamcluley.com recommended a service called Learn DMARC for testing DMARC configuration and it is excellent.
Learn and test SPF, DKIM and DMARC
Visualize, analyze and improve your email authentication setup
www.learndmarc.com
July 20, 2025 at 11:15 AM
freddieleeman.bsky.social
No DMARC policy and a SoftFail SPF policy? Here is a link to email authentication best practices: www.uriports.com/blog/spf-dki...
SPF, DKIM, and DMARC Best Practices
Reduce spoofing and phishing, build and maintain a solid reputation, and increase email deliverability with SPF, DKIM, and DMARC.
www.uriports.com
March 6, 2025 at 10:23 AM
pierrearlais.bsky.social
DMARC, DKIM, et SPF, un testeur bien pratique
dmarcchecker.app/
June 4, 2025 at 11:00 AM
swiftonsecurity.com
I know America is burning but incredible things are happening on the NANOG mailing list
Re: SPF/DKIM/DMARC et.al.: REALLY LONG [was: is it just me or...] Sir, this is a Wendy's.
July 4, 2025 at 1:09 AM
goorden.be
"Trouwens, uw DNS staat nog niet goed, er ontbreken DMARC records.”
“Oh, ik dacht dat gij een journalist waart?”
“Ja, maar ne speciale. 😉”
September 23, 2026 at 11:35 AM
burnworks.bsky.social
DMARC レポートを読むのがダルすぎたので、ついカッとなって DMARC レポートの XML を HTML に変換するスクリプトを書いた。かなり雑なのと Google さんから送信されてくる DMARC レポートでしか試してないので、他の方の役に立つかは知りませんが公開しておきます
github.com/burnworks/dm...
GitHub - burnworks/dmarc-to-html-converter: Convert DMARC report files from xml to human-readable HTML formats.
Convert DMARC report files from xml to human-readable HTML formats. - burnworks/dmarc-to-html-converter
github.com
February 14, 2024 at 7:39 AM
kjcharleswriter.com
Right, I'm switching my KJC email to proton, just got to set up a custom domain...DNS...something something DMARC something...please can he just die already, preferably in a bizarre incident involving the heads of all the major tech companies?
January 20, 2026 at 10:26 AM
secvalve.bsky.social
I know I regularly joke about it being DNS.

But it sure wasn’t DMARC.
January 9, 2026 at 7:28 AM
annacardillo.eurosky.social
Den Abschluss des 1. Konferenztages #DSK2026 macht dann unser Stephan Hansen-Oest zu E-Mail-Marketing & Datenschutz in 2026: Risiken, Chancen & Best practice .
Es wird technisch: SPF/DKM/DMARC/BIMI
September 24, 2026 at 4:02 PM
gigazine.net
自分のメールアドレスを使ってスパムかどうか判定するSPF・DKIM・DMARCの仕組みをアニメーションで理解できる「Learn and Test DMARC」レビュー
https://gigazine.net/news/20240309-dmarc-tester/
自分のメールアドレスを使ってスパムかどうか判定するSPF・DKIM・DMARCの仕組みをアニメーションで理解できる「Learn and Test DMARC」レビュー
電子メールが送受信される際には、ドメインやIPアドレス、電子署名を認証することで、なりすましやスパムメールを防いでいます。そのようなメール認証の仕組みについて、メールを受信してからどのような認証が行われているのか視覚化したウェブサイトが「Learn and Test DMARC」です。
gigazine.net
March 8, 2024 at 3:01 PM
pierrearlais.bsky.social
Un excellente synthèse sur la délivrabilité des emails - SPF, DKIM et DMARC.
www.xomedia.io/a-dee...
June 24, 2025 at 11:00 AM
fletch.online
Of course they fucked up DMARC. Of fucking course they did. Bare minimum effort and they couldn’t even be arsed doing that.
February 23, 2025 at 12:02 AM
pierrearlais.bsky.social
Comprendre et visualiser comment vos emails cheminent sur le Net (SPF, DKIM, DMARC) : learndmarc.com
October 11, 2023 at 8:40 PM
jacob.gold
This security@ "security researcher" (spammer) is threatening to publicly disclose my DMARC "misconfiguration" if I don't pay a bounty.
December 16, 2025 at 7:05 PM
rusty.todayintabs.com
The fun thing about running a newsletter is I get stats on exactly how many spam emails someone sent using my address.
A DMARC compliance report showing that last Sunday someone blasted out over a million emails, all with my tabs email address as the (fake) sender. Of course none of them complied with DMARC. I hope this didn't convince every mail agent in the world that I'm a spammer.
September 9, 2025 at 8:38 PM
jnievele.bsky.social
You don't have a DMARC policy on this domain so it could be spoofed, especially with the wide open SPF you have set up
March 6, 2025 at 9:48 AM
juneyoon.actor
Every time I ask the public to send in emails, a number of them end up in the junk/spam folder. Without fail.

And I don't want your emails to end up in anyone's spam folder.

First step is to check if your SPF, DKIM, and DMARC are setup correctly.

www.cloudflare.com/learning/ema...
What are DMARC, DKIM, and SPF?
SPF, DKIM, and DMARC help prevent spam and authenticate email senders by verifying where emails come from. Learn how SPF, DKIM, and DMARC work.
www.cloudflare.com
March 25, 2025 at 4:53 PM
rocketmeupcyber.bsky.social
Comparing SPF, DKIM, and DMARC —  Implementing Comprehensive Email Security
link.medium.com
December 8, 2024 at 5:18 PM
seguridadamerica.bsky.social
🛡️ ¿Quién envía correos con tu dominio?

Sin DMARC, cualquiera puede suplantar a tu empresa. Gmail, Yahoo y Microsoft ya lo exigen.

👉 Diagnóstico DMARC gratis en dmarc.cl

#DMARC #Ciberseguridad
September 25, 2026 at 4:21 PM
cloudflare.social
Get unified visibility into your email authentication posture and reach full DMARC enforcement with deeper reporting, record analysis, and SPF audits free for every Cloudflare customer. https://cfl.re/4eog4XI
Cloudflare DMARC Management is now generally available
Cloudflare DMARC Management is now generally available, with a redesigned experience built to help you reach full DMARC enforcement as easily as possible.
blog.cloudflare.com
June 16, 2026 at 1:05 PM
postrss.bsky.social
SPF, DKIM and DMARC: Why Your Email Lands in Spam

https://internet-solutions.net/spf-dkim-dmarc-why-email-lands-in-spam/
SPF, DKIM and DMARC: Why Your Email Lands in Spam
internet-solutions.net
September 25, 2026 at 3:54 PM