now also available in English:
Four modern mail systems for self-hosting -- Universal support for mail security standards
https://www.sidn.nl/en/news-and-blogs/four-modern-mail-systems-for-self-hosting

An increasing number of mail software packages are now available that offer out-of-box support for all security standards, and are easy to set up as well. In this article, we consider four modern open-source packages for self-hosting: #Mox, #Chasquid, #Stalwart and #Maddy.

#SPF #DKIM #DMARC #DANE #STARTTLS #MTA-STS #InternetSecurity

@stalwartlabs

Bon Mastodon, faut qu'on cause !

Y a @jdenoy qui a fait un super taff en scannant la configuration mail de tous les domaines en .fr, plus de 4 million de domaines !

C'est rare que je fasse de la pub comme ça, mais il en a même fait un rapport qui balance des chiffres intéressants. Vraiment, allez le télécharger, vous pouvez lui faire confiance concernant l'utilisation de votre adresse mail.

C'est par là 👇
https://rapport.mailauthcheck.com/

#Mail #SPF #DKIM #DMARC

op SIDN.nl:
Vier moderne mail-systemen voor self-hosting -- Beveiligingsstandaarden voor mail universeel ondersteund
https://www.sidn.nl/nieuws-en-blogs/vier-moderne-mailsystemen-voor-self-hosting

Inmiddels zijn er meerdere software-pakketten beschikbaar die én alle beveiligingsstandaarden out-of-the-box ondersteunen én makkelijk op te zetten zijn. In dit artikel bespreken we vier moderne open-source mail-pakketten voor self-hosting: #Mox, #Chasquid, #Stalwart en #Maddy.

#SPF #DKIM #DMARC #DANE #STARTTLS #MTA-STS #InternetSecurity

@stalwartlabs

Warum bekomme ich von #yahoo #DMARC reports, obwohl ich mit denen gar keinen Mail-Kontakt habe? 🤔​

Zumindest nicht wissentlich.

I've ranted before about #DMARC and whether it's worth private mail-server admins implementing.
Today's rant: the reference implementation, https://github.com/trusteddomainproject/OpenDMARC, has been abandoned for ~4 years, and its maintainers, http://www.trusteddomain.org/, are completely AWOL.
Linux distro maintainers have had to do proxy maintenance themselves, picking and choosing patches from pull requests submitted to the project to add to their distributions.
This sucks.
#FOSS #SMTP #OpenDMARC #TrustedDomainProject

🔗 Google Spoofed Via DKIM Replay Attack: A Technical Breakdown https://easydmarc.com/blog/google-spoofed-via-dkim-replay-attack-a-technical-breakdown/

#DKIM #DMARC #Spoofing #Phishing

DMARCbis replaces the PSL with DNS Tree Walk: What's the Difference? https://www.uriports.com/blog/dmarcbis-dns-tree-walk/

#DMARC #DMARCbis #DNS

@stefan The easiest way I know to check an XML report:

https://us.dmarcian.com/xml-to-human-converter/

#email #dmarc #dkim #spf

I find it really sad that Trusteddomainproject (authors of OpenDMARC) is basically dead

#postfix #dmarc #smtp

Google Email Systems Spoofed by Phishing Campaign Reusing Valid DKIM Signatures

#Cybersecurity #Gmail #Phishing #DKIM #DMARC #EmailSecurity #Google #Spoofing #OAuth #InfoSec #CyberAttack

https://winbuzzer.com/2025/04/22/google-email-spoofed-by-phishing-campaign-reusing-valid-dkim-signatures-xcxwbn/

Domains, die #DMARC Empfangsadressen konfiguriert haben, die es nicht gibt / deren Mailbox voll ist / die Reports als Spam abweisen / ...
Weiß man da mehr darüber? 🤦

#emailishard

Ever wonder what email servers are doing behind the scenes? At https://LearnDMARC.com, we turned the confusing world of email authentication into a visual story.

📡 Watch servers talk it out.
🎯 Take the DMARC quiz.
📬 Paste email headers.

Perfect for learners, IT pros, and anyone who’s ever yelled “WHY is SPF failing?!” Best of all? It’s free, and your data isn’t stored or used for anything beyond creating the visualization.

#EmailSecurity #DMARC #LearnDMARC #EmailAuthentication #SPF #DKIM #URIports

🚨 Attention email marketers! Outlook's new bulk email rules are about to impact your domain's deliverability. Starting May 5, 2025, make sure your emails are SPF, DKIM, and DMARC compliant to avoid rejection! #EmailMarketing #Outlook #SPF #DMARC #TechNews

https://pupuweb.com/what-are-outlooks-new-bulk-email-rules-requirements-protect-your-domain-from-rejection-today/

Google DMARC reports are back! After going quiet since April 13, Google has resumed sending DMARC aggregate reports as of 19:15 UTC today. So far, the reports only include data from yesterday (April 16), but it is a good sign that things are starting to flow again.

#DMARC #EmailSecurity #Google

@bearstech
trop bien cet outil, j'ai enfin à peu près compris ces mécanismes !
#dmarc #spf #dkim #mail

Merci pour le partage !

@jeremiah_ @elb #NNCPNET, the new #NNCP-based email network, now has a bidirectional, opt-in, Internet #email bridge! https://salsa.debian.org/jgoerzen/docker-nncpnet-mailnode/-/wikis/bridge/intro

This gates Internet email to/from NNCP. The bridge is off by default. It is a full participant in #SPF, #DKIM, #DMARC, and #TLS in both directions.

Yes, now you can get Internet email straight to your #RaspberryPi ! (And even without this, your Pis can email each other!)

Boy do I love spending time with #Google services! (NOT!).

Damn #DMARC requirements for bulk sending!

Now I’m not one that sends newsletters all the time (maybe once/twice a year), but even when using a service such as #mailgun there are still special settings that need to be configured (while I am not the one that has over 5k/day newsletter sending setup) such as #DMARC.

Rant over -.-

🌐 L'Afnic est présente aujourd'hui jusqu'au 3 avril au Forum INCYBER Europe (FIC) au stand F-40 à Lille.

🛡️ Une belle opportunité d'échanger sur les enjeux DNS de la cybersécurité.

➡️ Découvrez également notre nouvelle formation NIS 2 Lead Implementer https://www.afnic.fr/produits-services/formations/formation-nis-2-lead-implementer/

Et explorer toutes nos formations sur la sécurisation du DNS https://www.afnic.fr/produits-services/formations/

Venez rencontrer Lotfi Benyelles, Benoît Ampeau et Régis Massé au Stand F-40 !

#Afnic #DNS #InCyber #Cybersécurité #SPF #DKIM #DMARC

System Administration

Week 8, The Simple Mail Transfer Protocol, Part III

In this video, we look at ways to combat Spam. In the process, we learn about email headers, the Sender Policy Framework (#SPF), DomainKeys Identified Mail (#DKIM), and Domain-based Message Authentication, Reporting and Conformance (#DMARC). #SMTP doesn't seem quite so simple any more...

https://youtu.be/KwCmv3GHGfc

#SysAdmin #SRE #DevOps

Letzte Woche fand das erste Treffen mit Mail-Providern zum E-Mail-Sicherheits-Jahr 2025 statt. Mit dabei war auch die Präsidentin des BSI, Claudia Plattner. Ich kann mich den Worten von Fabian Bock nur anschließen und freue mich schon auf die vielen weiteren Treffen und Aktionen, die wir für das Jahr geplant haben :blobcheer:

https://mail.de/de/blog/2025-03-unsere-teilnahme-am-e-mail-sicherheits-jahr-2025

#MailSecurity #TeamBSI #SPF #DKIM #DMARC #STARTTLS #DNSSEC #DANE