Blog DMARC

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How to protect parked domains using SPF, DKIM and DMARC ?

November 22, 2022

If you possess defensive domain names, also referred to as parked domains or passive domain names, that are not intended for email usage, you may want to take measures to secure them. To prevent these domains from being misused by unauthorized parties, we suggest adding the following DNS records...

Countering Domain Impersonation: An Overview of Blocking Lookalike Domains

February 3, 2023

Phishing campaigns frequently utilize deceitful domain names to achieve their malicious objectives. These lookalike domains may appear either in the From field of an email or as a link in the email's body that the perpetrator wants the victim to click on. Phishing is the most commonly employed...

Malicious IPs and Domains Take down

January 5, 2023

Whether it is to represent your brand online, create a store on the Internet or a simple portal, the multiplication of Internet sites makes the creation of a domain name essential. In order to index your content more efficiently and make it more visible, you must have a domain name because it...

Protect your onmicrosoft.com domain with DMARC

December 29, 2022

When you installed your O365 tenant, maybe you forgot about it if it's been a while, Microsoft reserved a domain for you : xxxx.onmicrosoft.com (MOERA - Microsoft Online Email Routing Address). For instance at Oppidum Security : oppidumsecurity.onmicrosoft.com Your users can therefore...

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- Le directeur de la publication du site est le Président d’Oppidum Sécurité Informatique : M. Fabien Soulis