Microsoft blocks Outlook from sending two more file types over security concerns

(Image credit: Shutterstock / JarTee)

Microsoft will block .msix and .msixbundle email attachments in New Outlook and Outlook Web

Change aims to reduce malware delivery through application package files sent via email

Organizations relying on these formats must explicitly allow them before rollout begins

Users of New Outlook for Windows and Outlook on the Web in Exchange Online will no longer be able to download email attachments of two file types: .msix, and .msixbundle, Microsoft has confirmed, saying it’s for…