Set up Microsoft Defender for Office 365
In this post I want to give you a summary about what Microsoft Defender for Office 365 is exactly and…
Email Authentication by using DMARC, DKIM and SPF
In this post I want to show how you can prevent that your email domain is abused for email spoofing…
Set up DMARC (verification) for Postfix on Ubuntu
Last week I wrote a post about how to set up SPF and DKIM for Postfix on Ubuntu, today I…
Set up DomainKeys Identified Mail (DKIM) in Office 365
Either you can set up DKIM by using the Microsoft 365 Defender portal or manually by using PowerShell. First I…
Set up SPF and DKIM for Postfix on Ubuntu
In this post I want to show how to set up the SPF (Sender Policy Framework) and DomainKeys Identified Mail (DKIM)…
How to reject Emails in Office 365 they fail DMARC
EASYDMARC had an interesting blog post about DMARC handling with Microsoft 365. DMARC and Microsoft : What is Happening?https://easydmarc.com/blog/dmarc-and-microsoft/ You…
Set up DomainKeys Identified Mail (DKIM) on Exchange on-premise
Out of the box on-premise Exchange Server doesn’t support DKIM signing. To deploy DKIM for your on-premises Exchange Servers you…