--- title: Email Bombing Protection description: Microsoft has a new detection capability in Microsoft Defender for Office 365 to help protect organizations from a threat known as email bombing. image: https://www.daymarksi.com/hubfs/Email%20Bombing.jpg --- - [MICROSOFT SERVICE OFFERINGS](https://www.daymarksi.com/microsoft-service-offerings) - [CONTACT](https://www.daymarksi.com/location-for-our-new-england-office-massachusetts) - [SUPPORT](https://www.daymarksi.com/support) [![DM_LogoTag_white-20yr](https://www.daymarksi.com/hubfs/brand-assets/DM_LogoTag_white-20yr.png "DM_LogoTag_white-20yr")](https://www.daymarksi.com) - [About](https://www.daymarksi.com/about-daymark) - [Why Daymark](https://www.daymarksi.com/why-daymark) - [Leadership](https://www.daymarksi.com/leadership) - [Industry Awards](https://www.daymarksi.com/industry-awards) - [Daymark Solutions Charitable Trust](https://www.daymarksi.com/charitable-trust) - [Customers](https://www.daymarksi.com/customers) - [Testimonials](https://www.daymarksi.com/testimonials) - [Technical Certifications](https://www.daymarksi.com/technical-certifications) - [Careers](https://www.daymarksi.com/careers) - [Locations](https://www.daymarksi.com/location-for-our-new-england-office-massachusetts) - [Solutions](https://www.daymarksi.com/solutions) - [Cloud Solutions](https://www.daymarksi.com/cloud) - [CMMC Compliance](https://www.daymarksi.com/understanding-the-cybersecurity-maturity-model-certification) - [Data Center Infrastructure](https://www.daymarksi.com/solutions/data-center-infrastructure-for-storage-networking-compute-security) - [Data Protection](https://www.daymarksi.com/solutions/data-protection-backups-recovery-restore) - [Networking](https://www.daymarksi.com/solutions/networking-and-security) - [Security](https://www.daymarksi.com/solutions/networking-and-security) - [Virtualization](https://www.daymarksi.com/solutions/virtualization) - [All Technology Partners](https://www.daymarksi.com/partners) - Cloud - [Microsoft Azure](https://www.daymarksi.com/microsoftazure) - [Microsoft Azure Government](https://www.daymarksi.com/protecting-government-data-for-the-defense-industrial-base) - [Microsoft 365](https://www.daymarksi.com/microsoft-365) - [Copilot for Microsoft 365](https://www.daymarksi.com/copilot-for-microsoft-365) - [Microsoft 365 GCC High](https://www.daymarksi.com/microsoft-gcc-high-for-defense-contractors) - [Mimecast](https://www.daymarksi.com/cloud) - [Okta](https://www.daymarksi.com/cloud) - [All Cloud Partners](https://www.daymarksi.com/cloud-partners) - [Services](https://www.daymarksi.com/services) - [Microsoft Service Offerings](https://www.daymarksi.com/microsoft-service-offerings) - [Assessment & Health Checks](https://www.daymarksi.com/services/assessment-and-health-checks) - [Cloud Architecture](https://www.daymarksi.com/services/custom-cloud-computing-implementations-and-services-in-new-england) - [CMMC Compliance Readiness](https://www.daymarksi.com/understanding-the-cybersecurity-maturity-model-certification) - [Contract & Maintenance Management](https://www.daymarksi.com/services/contract-maintenance-management) - [Documentation & Knowledge Transfer](https://www.daymarksi.com/services/documentation) - [Government Community Cloud](https://www.daymarksi.com/microsoft-gcc-high-for-defense-contractors) - [Identity Mangement](https://www.daymarksi.com/microsoft-entra-id-workshop) - [Implementations](https://www.daymarksi.com/services/it-project-implementation-on-budget-on-time-on-scope) - [Proof of Concepts](https://www.daymarksi.com/services/proof-of-concept-for-information-technology-initiatives) - [Solution Architecture](https://www.daymarksi.com/services/it-solution-architecture-for-complex-storage-network-and-computer-solutions) - [Staging & Integration](https://www.daymarksi.com/services/staging-and-integration) - [MyDaymark](https://www.daymarksi.com/mydaymark/) - [Advanced Support](https://www.daymarksi.com/mydaymark/advanced-support) - [Premier Support](https://www.daymarksi.com/mydaymark/premier-support) - [Managed Services](https://www.daymarksi.com/mydaymark/managed-services) - [Management Platform](https://www.daymarksi.com/mydaymark/management-platform) - [Security & Compliance](https://www.daymarksi.com/mydaymark/security-compliance) - Industries - [Energy & Utilities](https://www.daymarksi.com/new-england-it-project-management-and-implementation-for-energy-and-utilities-industry) - [Financial Services](https://www.daymarksi.com/new-england-it-project-implementation-for-financial-services-companies) - [Defense Industrial Base](https://www.daymarksi.com/protecting-government-data-for-the-defense-industrial-base) - [Healthcare](https://www.daymarksi.com/healthcare-information-technology-development-and-implementation) - [Life Sciences](https://www.daymarksi.com/new-england-it-initiative-implementation-for-life-sciences-companies) - [Resources](https://www.daymarksi.com/information-technolocy-resources) - [Case Studies](https://www.daymarksi.com/information-technolocy-resources?types=casestudy) - [Data Sheets](https://www.daymarksi.com/information-technolocy-resources?types=datasheet) - [Partner Resources](https://www.daymarksi.com/information-technolocy-resources?types=partnerresources) - [Workshops](https://www.daymarksi.com/information-technolocy-resources?types=workshop) - [News & Events](https://www.daymarksi.com/news-events) - Blog - [Daymark IT Insights](https://www.daymarksi.com/blog) - [Cole Tramp's Microsoft Insights](https://www.daymarksi.com/blog/topic/cole-tramps-microsoft-insights) ![banner-why-daymark.jpg](https://www.daymarksi.com/hs-fs/hub/30865/file-2671640025-jpg/2015_Images/Banner_Images/banner-why-daymark.jpg?width=1400&name=banner-why-daymark.jpg "banner-why-daymark.jpg") ##### **Daymark IT Insights** Enterprise IT, cloud, security, and AI guidance from Daymark’s technology experts. # [Email Bombing Protection](https://www.daymarksi.com/blog/protection-from-mail-bombing) Posted by [Blake Bernard](https://www.daymarksi.com/blog/author/blake-bernard) Wed, Jul 16, 2025 - [Tweet](https://twitter.com/share) ![Email Bombing](https://www.daymarksi.com/hs-fs/hubfs/Email%20Bombing.jpg?width=1280&height=853&name=Email%20Bombing.jpg) Microsoft is introducing a new detection capability in Microsoft Defender for Office 365 to help protect your organization from a growing threat known as email bombing. This form of abuse floods mailboxes with high volumes of email to obscure important messages or overwhelm systems. The new “Mail Bombing” detection will automatically identify and block these attacks, helping security teams maintain visibility into real threats. Email bombing is a tactic to hide important emails by flooding your inbox with irrelevant ones. For instance, an attacker might order expensive items using your Amazon account and bury the confirmation emails. If you own a domain, they could be trying to transfer it. They may also hide transaction confirmations if they accessed your bank or financial accounts. Ultimately these attacks are designed to distract you, the target, from the “real” email they do not want you to see. **When this will happen:** Microsoft began rolling out in late June 2025 and expects to complete by late July 2025. **How this affects your organization:** Security Operations Analysts and Administrators will see a new detection type labeled Mail Bombing in the following locations: - Threat Explorer - Email entity view - Email Summary Panel - Advanced Hunting Messages identified as part of a mail bombing campaign will be automatically sent to the Junk folder. Safe Senders settings will continue to be honored—messages from those senders will not be impacted. This feature is on by default and requires no manual configuration. **What you can do to prepare:** - Inform your Security Operations team about this new detection. - Update internal documentation and training materials as needed. - Review Junk folder handling policies to ensure alignment with your organization’s expectations. **Compliance considerations:** - Alters processing/storage of existing data Yes – modifies how email messages are classified and routed - Introduces/modifies AI/ML capabilities Yes – introduces new detection logic - Impacts Purview capabilities Maybe – may affect audit logging or eDiscovery visibility for junked messages - Alters compliance monitoring/reporting Maybe – new detection may appear in compliance dashboards **How Daymark Can Help** If you have questions about mail bombing, or need guidance on securing your infrastructure, please [reach out](https://www.daymarksi.com/location-for-our-new-england-office-massachusetts). Daymark Microsoft consultants are happy to help.   ### Subscribe to Daymark Insights ### Latest Posts ### Browse by Tag - [Microsoft (88)](https://www.daymarksi.com/blog/topic/microsoft) - [Cloud (70)](https://www.daymarksi.com/blog/topic/cloud) - [Cole Tramp's Microsoft Insights (58)](https://www.daymarksi.com/blog/topic/cole-tramps-microsoft-insights) - [Azure (55)](https://www.daymarksi.com/blog/topic/azure) - [Security (49)](https://www.daymarksi.com/blog/topic/security) - [Data Protection (43)](https://www.daymarksi.com/blog/topic/data-protection) - [Microsoft Fabric (41)](https://www.daymarksi.com/blog/topic/microsoft-fabric) - [Data Governance (38)](https://www.daymarksi.com/blog/topic/data-governance) - [AI (35)](https://www.daymarksi.com/blog/topic/ai) - [Partners (33)](https://www.daymarksi.com/blog/topic/partners) - [Compliance (31)](https://www.daymarksi.com/blog/topic/compliance) - [Data Center (30)](https://www.daymarksi.com/blog/topic/data-center) - [CMMC (27)](https://www.daymarksi.com/blog/topic/cmmc) - [Backup (26)](https://www.daymarksi.com/blog/topic/backup) - [Daymark News (23)](https://www.daymarksi.com/blog/topic/daymark-news) - [Storage (22)](https://www.daymarksi.com/blog/topic/storage) - [GCC High (19)](https://www.daymarksi.com/blog/topic/gcc-high) - [Veritas (18)](https://www.daymarksi.com/blog/topic/veritas) - [Virtualization (18)](https://www.daymarksi.com/blog/topic/virtualization) - [Cybersecurity (17)](https://www.daymarksi.com/blog/topic/cybersecurity) - [Azure AI Foundry (16)](https://www.daymarksi.com/blog/topic/azure-ai-foundry) - [Featured Gov (16)](https://www.daymarksi.com/blog/topic/featured-gov) - [Government Cloud (16)](https://www.daymarksi.com/blog/topic/government-cloud) - [Disaster Recovery (15)](https://www.daymarksi.com/blog/topic/disaster-recovery) - [Cloud Backup (14)](https://www.daymarksi.com/blog/topic/cloud-backup) - [Managed Services (13)](https://www.daymarksi.com/blog/topic/managed-services) - [Copilot (11)](https://www.daymarksi.com/blog/topic/copilot) - [Industry Expertise (9)](https://www.daymarksi.com/blog/topic/industry-expertise) - [NIST SP 800-171 (7)](https://www.daymarksi.com/blog/topic/nist-sp-800-171) - [Hybrid Cloud (6)](https://www.daymarksi.com/blog/topic/hybrid-cloud) - [Networking (6)](https://www.daymarksi.com/blog/topic/networking) - [Power BI (6)](https://www.daymarksi.com/blog/topic/power-bi) - [Pure Storage (4)](https://www.daymarksi.com/blog/topic/pure-storage) - [Reporting (3)](https://www.daymarksi.com/blog/topic/reporting) - [Services (3)](https://www.daymarksi.com/blog/topic/services) - [AI for Defense (2)](https://www.daymarksi.com/blog/topic/ai-for-defense) - [Cloud Security (2)](https://www.daymarksi.com/blog/topic/cloud-security) - [Everpure (2)](https://www.daymarksi.com/blog/topic/everpure) - [GDPR (2)](https://www.daymarksi.com/blog/topic/gdpr) - [Microsoft Purview (2)](https://www.daymarksi.com/blog/topic/microsoft-purview) - [Apple (1)](https://www.daymarksi.com/blog/topic/apple) - [CMMC 2.0 Requirements (1)](https://www.daymarksi.com/blog/topic/cmmc-2-0-requirements) - [FedRamp AI (1)](https://www.daymarksi.com/blog/topic/fedramp-ai) - [Mobile (1)](https://www.daymarksi.com/blog/topic/mobile) - [Power Automate (1)](https://www.daymarksi.com/blog/topic/power-automate) [see all](https://www.daymarksi.com/blog/protection-from-mail-bombing#) ### How Can We Help?  [![Speak With An Expert](https://no-cache.hubspot.com/cta/default/30865/5de282fd-640c-49b2-bf45-603dbee66842.png)](https://cta-redirect.hubspot.com/cta/redirect/30865/5de282fd-640c-49b2-bf45-603dbee66842) #### About Daymark Solutions is an experienced technology integration and solutions provider that helps organizations effectively architect, implement, and deploy customized solutions to help their customers grow and scale their IT infrastructure. Specializing in AI, cloud and modern data center solutions, Daymark’s unique combination of in-depth technical knowledge, extensive experience, and proven methodologies enable its customers to successfully address even the most difficult technology challenges. #### Connect      #### Links - [About](https://www.daymarksi.com/about-daymark) - [Industry Expertise](https://www.daymarksi.com/industry-experience-in-finance-healthcare-energy-utilities-and-life-sciences) - [Solutions](https://www.daymarksi.com/solutions) - [Services](https://www.daymarksi.com/services) - [Cloud](https://www.daymarksi.com/services/custom-cloud-computing-implementations-and-services-in-new-england) - [Resources](https://www.daymarksi.com/whitepapers-videos-analyst-reports-and-case-studies-on-information-technologies) - [News & Events](https://www.daymarksi.com/news-events) - [Blog](https://www.daymarksi.com/blog) #### Contact **Corporate Headquarters** Daymark Solutions 131 Middlesex Turnpike Burlington, MA 01803 **Corporate:** [+1 781-359-3000](tel:17813593000) **Email:** [info@daymarksi.com](mailto:info@daymarksi.com) ![DM_LogoTag_white.png](https://www.daymarksi.com/hs-fs/hubfs/Daymarksi-2017/Image/DM_LogoTag_white.png?width=176&name=DM_LogoTag_white.png "DM_LogoTag_white.png") © 2026 Daymark Solutions, Inc. All rights reserved.  |  [Daymark Privacy Policy](https://www.daymarksi.com/hubfs/Daymark%20-%20Privacy%20Policy.pdf) ```json { "@context" : "https://schema.org", "@type" : "BlogPosting", "author" : { "@type" : "Person", "name" : "Blake Bernard", "url" : "https://www.daymarksi.com/blog/author/blake-bernard" }, "dateModified" : "2025-07-16T16:30:13.274Z", "datePublished" : "2025-07-16T16:30:13.000Z", "headline" : "Email Bombing Protection", "image" : [ "https://www.daymarksi.com/hubfs/Email%20Bombing.jpg" ], "mainEntityOfPage" : { "@id" : "https://www.daymarksi.com/blog/protection-from-mail-bombing", "@type" : "WebPage" }, "publisher" : { "@type" : "Organization", "logo" : { "@type" : "ImageObject", "url" : "https://www.daymarksi.com/hubfs/v2/images/daymark-logo.png" }, "name" : "Daymark Solutions, Inc." } } ```