Microsoft Purview: Purging mails from Inboxes using Content Search

You can use Microsoft Purview to search for specific content in Exchange Online (or SharePoint Online) using Content Search and, if desired, initiate a purge process. This article provides instructions on how to do this. Before getting started Note that you can also use Threat Explorer in MDO to initiate a hard delete by performing a manual remediation. However, when using Threat Explorer, you are limited to 30 days, which is sufficient for most remediation scenarios....

December 23, 2023 · 2 min

Microsoft Defender for Office 365: Anti-malware policies

Malware is specifically designed to harm or exploit devices, networks, or users. It includes various types of harmful software such as viruses, worms, trojan horses, ransomware, spyware, and adware. Malware can be distributed through email attachments, infected websites, malicious downloads, or other deceptive means. What you can manage with an Anti-malware policy Mailboxes in Exchange Online benefit from automatic protection against malware through Exchange Online Protection (EOP). EOP offers a multi-layered malware protection system designed to detect all known malware....

December 23, 2023 · 3 min

Microsoft Defender for Office 365: Anti-phishing policies

Phishing is an email attack that aims to steal sensitive information through messages that appear to be from legitimate or trusted senders. You can enhance the security of your Exchange Online mailboxes by implementing anti-phishing policies. What you can manage with Anti-phishing policies Anti-phishing policies provide enhanced control over incoming phishing emails, for instance, in cases where someone may attempt to impersonate your CEO or send messages from a domain that closely resembles yours....

December 22, 2023 · 7 min

Microsoft Defender for Office 365: Anti-spam policies

All inbound e-mail is automatically protected from spam by Exchange Online Protection (EOP) for Microsoft 365 organizations with mailboxes in Exchange Online. EOP uses anti-spam policies as part of your organization’s overall spam defense. What you can manage with Anti-spam policies Anti-spam policies provide you with control over both inbound and outbound email in Exchange Online. Within the Microsoft Security Portal, you can access the Anti-Spam Policy section, where three default policies are available for editing....

December 18, 2023 · 6 min

Get a handle on your SPF record

In this post, I will share my best practices for getting a handle on your SPF record. Why it makes sense to have a good SPF procedure in place In a previous blog post, I explained the limitations of SPF, best practices and how it works with DKIM and DMARC. It is useful to have a good SPF procedure to avoid future problems, because if you exceed the DNS lookup limit of 10:...

December 17, 2023 · 8 min