Skip Navigation

Cybersecurity @sh.itjust.works

Kid @sh.itjust.works

3mo ago

Microsoft to Block Emails With 550 5.7.15 Access denied Error

cybersecuritynews.com

Microsoft to Block Emails With 550 5.7.15 Access denied Error

2 comments

So .. this article published today, 5 May 2025, says that the Microsoft policy will start on 5 May 2025.
Some questions:
When did Microsoft announce this and where?
Is this a reasonable rollout timeline that affects pretty much anyone on the planet who does email?
As a society we run most of our activities through Google and Microsoft. At what point does this get classified as a utility and get regulated.
- This isn't Microsoft's announcement. They announced over a month ago. This also only affects bulk senders sending over 5,000 emails a day inbound to their Hotmail/Outlook.com service.
  And if you can't send DMARC-compliant emails in 2025, frankly you deserve to be blocked.