Domain-based Message Authentication, Reporting, and Conformance (DMARC) work with Sender Policy Framework (SPF) and Domain Keys Identified Mail (DKIM) to authenticate mail senders and ensure that destination email systems trust
Continue ReadingHow Office 365 treats inbound email that fails DMARC validation?
Problem Statement: Microsoft 365 email platform does not reject the emails failing DMARC policy despite the policy being set to “p=reject”. This is an approach that Microsoft has taken to
Continue ReadingIncoming DMARC configuration for Microsoft 365 Exchange Online platform
Connect to Microsoft Office 365 PowerShell : For upgrading DKIM keys in Microsoft Office 365 Exchange Online you need to first connect to Microsoft Office 365 PowerShell. The Microsoft 365
Continue ReadingManually Upgrade your DKIM keys in Microsoft Office 365 Exchange Online
What is ARC? When an email sender or Internet domain owner uses email authentication to make it easier to detect fraudsters sending messages that impersonate their domain, some services like
Please follow the below two steps to configure DKIM for the office 365 cloud (recommended values by Microsoft) Publish two CNAME records for your custom domain in DNS Enable DKIM
Continue ReadingEnable DKIM signing for your custom domain in Microsoft Office 365 exchange online
Email receivers may decide to override the policy that you have specified in your DMARC record. For example, you have set a policy of reject (p=reject) for your domain and
The table below shows the commands used in Windows Command Line, Linux Terminal and Mac OS Terminal to query for the SPF, DKIM and DMARC records for a domain. Follow
A mail receiver looks at the domain found in the From header of an email and looks up the DMARC reporting requests for that domain. It looks at the RUA
Continue ReadingHow do mail receivers know where to send DMARC aggregate and forensic reports to?
The standard needed to address the shortcomings of the standalone SPF protocol by explicitly telling receivers what to do and provide authentication reports back. These reports enabled the sender to
An aggregate report is an XML feedback report designed to provide visibility into emails that passed or failed SPF (Sender Policy Framework) and DKIM (DomainKeys Identified Mail). The report provides
Continue ReadingWhat is the difference between aggregate report and forensic report?