Microsoft is upping the ante on Exchange Server security, warning that outdated on-premises systems will soon be blocked from sending email to Exchange Online.

Microsoft is working to resolve an ongoing Exchange Online outage that is delaying email sent to and received from external domains. The company first acknowledged this incident (tracked under ...

Microsoft Exchange Server SE CU1 remains without a firm release date as AI-assisted security reviews add to testing and patching work.

Are there any free (or cheap) Windows-compatible email server programs out there? And if so, what's easiest to set up? The reason I ask is I have an old k6-300 system sitting here, that I've been ...