Have you encountered a recent delivery issue with Microsoft?

Deliverability
1

When we submit support requests at https://olcsupport.office.com/, it prominently highlights a message.

We are aware of an issue that may result in certain IP addresses being temporarily rejected at higher rates. We are actively investigating the issue. Please continue to submit tickets if you are experiencing this problem.

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Hope it’s helpful to everyone.

2

Good intel, thanks for sharing.

3

MailOps list has a few reports of the false positive 550 5.7.1 S3150 bounces.

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4

This was from a MailMan List for a local church.

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5

Maybe… Spamhaus staff are also doing vibe coding. …:grinning_face: