These aren't temporary. Every message I have sent for years has got the same block message. Sure, they aren't necessarily outdated but they aren't lasting for a

These aren't temporary. Every message I have sent for years has got the same block message. Sure, they aren't necessarily outdated but they aren't lasting for a few minutes. > When working with DMARC aligned domains, most email service providers will rely solely on content based spam detection This seems to be true for most major providers. But my experience shows that Microsoft and Apple don't do this. They still apply strict broad IP-based blocking. Sending messages from the same domain via a relay such as AWS SES is perfectly fine. But if the sender IP is in Digital Ocean ASN it is dropped right away. The domain is p=reject