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
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
April 9, 2025 at 6:11 PM
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
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
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)
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.
This means that agencies are probably marking DOGE emails as spam.
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
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)
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
Ohhh…on this week’s @smashingsecurity.com podcast @grahamcluley.com recommended a service called Learn DMARC for testing DMARC configuration and it is excellent.
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
No DMARC policy and a SoftFail SPF policy? Here is a link to email authentication best practices: www.uriports.com/blog/spf-dki...
DMARC, DKIM, et SPF, un testeur bien pratique
dmarcchecker.app/
dmarcchecker.app/
June 4, 2025 at 11:00 AM
DMARC, DKIM, et SPF, un testeur bien pratique
dmarcchecker.app/
dmarcchecker.app/
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.](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:xraomsuf6pvh7r2cqtdwhkvm/bafkreibspuuahdnatzigivd45ythr2ffoyvafmjwjirtpdte5ujvrzkbkm)
July 4, 2025 at 1:09 AM
I know America is burning but incredible things are happening on the NANOG mailing list
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.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
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.com/burnworks/dm...
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
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?
I know I regularly joke about it being DNS.
But it sure wasn’t DMARC.
But it sure wasn’t DMARC.
January 9, 2026 at 7:28 AM
I know I regularly joke about it being DNS.
But it sure wasn’t DMARC.
But it sure wasn’t DMARC.
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/
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
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/
https://gigazine.net/news/20240309-dmarc-tester/
DMARC Grew New Teeth Without Breaking the Old Ones
https://nicheof.one/feed/dmarc-grew-new-teeth/
https://nicheof.one/feed/dmarc-grew-new-teeth/
DMARC Grew New Teeth Without Breaking the Old Ones
TL;DR: DMARC’s 2026 standards update keeps existing records working while replacing Public Suffix List discovery with a DNS tree walk, removing pct, adding a testing flag and nonexistent-subdomain policy, and splitting reports into separate RFCs.
Email authentication has a new set of manuals. Your o
nicheof.one
September 27, 2026 at 5:08 AM
DMARC Grew New Teeth Without Breaking the Old Ones
https://nicheof.one/feed/dmarc-grew-new-teeth/
https://nicheof.one/feed/dmarc-grew-new-teeth/
"Trouwens, uw DNS staat nog niet goed, er ontbreken DMARC records.”
“Oh, ik dacht dat gij een journalist waart?”
“Ja, maar ne speciale. 😉”
“Oh, ik dacht dat gij een journalist waart?”
“Ja, maar ne speciale. 😉”
September 23, 2026 at 11:35 AM
"Trouwens, uw DNS staat nog niet goed, er ontbreken DMARC records.”
“Oh, ik dacht dat gij een journalist waart?”
“Ja, maar ne speciale. 😉”
“Oh, ik dacht dat gij een journalist waart?”
“Ja, maar ne speciale. 😉”
Un excellente synthèse sur la délivrabilité des emails - SPF, DKIM et DMARC.
www.xomedia.io/a-dee...
www.xomedia.io/a-dee...
June 24, 2025 at 11:00 AM
Un excellente synthèse sur la délivrabilité des emails - SPF, DKIM et DMARC.
www.xomedia.io/a-dee...
www.xomedia.io/a-dee...
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
Es wird technisch: SPF/DKM/DMARC/BIMI
September 24, 2026 at 4:02 PM
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
Es wird technisch: SPF/DKM/DMARC/BIMI
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
Of course they fucked up DMARC. Of fucking course they did. Bare minimum effort and they couldn’t even be arsed doing that.
Comprendre et visualiser comment vos emails cheminent sur le Net (SPF, DKIM, DMARC) : learndmarc.com
October 11, 2023 at 8:40 PM
Comprendre et visualiser comment vos emails cheminent sur le Net (SPF, DKIM, DMARC) : learndmarc.com
💥 Cold email tips:
Authenticate every domain.
SPF, DKIM, DMARC.
Send yourself a test email and check the headers.
No auth = straight to spam.
Authenticate every domain.
SPF, DKIM, DMARC.
Send yourself a test email and check the headers.
No auth = straight to spam.
September 26, 2026 at 12:02 PM
💥 Cold email tips:
Authenticate every domain.
SPF, DKIM, DMARC.
Send yourself a test email and check the headers.
No auth = straight to spam.
Authenticate every domain.
SPF, DKIM, DMARC.
Send yourself a test email and check the headers.
No auth = straight to spam.
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
This security@ "security researcher" (spammer) is threatening to publicly disclose my DMARC "misconfiguration" if I don't pay a bounty.
The fun thing about running a newsletter is I get stats on exactly how many spam emails someone sent using my address.
September 9, 2025 at 8:38 PM
The fun thing about running a newsletter is I get stats on exactly how many spam emails someone sent using my address.
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
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
DMARC Grew New Teeth Without Breaking the Old Ones
https://nicheof.one/feed/dmarc-grew-new-teeth/
https://nicheof.one/feed/dmarc-grew-new-teeth/
DMARC Grew New Teeth Without Breaking the Old Ones
TL;DR: DMARC’s 2026 standards update keeps existing records working while replacing Public Suffix List discovery with a DNS tree walk, removing pct, adding a testing flag and nonexistent-subdomain policy, and splitting reports into separate RFCs.
Email authentication has a new set of manuals. Your o
nicheof.one
September 27, 2026 at 10:07 AM
DMARC Grew New Teeth Without Breaking the Old Ones
https://nicheof.one/feed/dmarc-grew-new-teeth/
https://nicheof.one/feed/dmarc-grew-new-teeth/
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...
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
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...
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...
Comparing SPF, DKIM, and DMARC — Implementing Comprehensive Email Security
link.medium.com
December 8, 2024 at 5:18 PM
Comparing SPF, DKIM, and DMARC — Implementing Comprehensive Email Security