I usually use this for testing email and you have an exceptionally good score.
https://www.mail-tester.com/test-zcr9um227
I'm presuming you are only having this issue with this email provider?
Spam filters score an email based on many factors and it's usually not a single thing that will cause a rejection unless it's a big one like invalid reverse DNS. Instead it's the total score that will cause a rejection. While the encoding in the headers can cause the score to increase on some spam filters it's typically a minor issue. Sounds to me like they are being excessively aggressive with their scoring.
https://www.mail-tester.com/test-zcr9um227
I'm presuming you are only having this issue with this email provider?
Spam filters score an email based on many factors and it's usually not a single thing that will cause a rejection unless it's a big one like invalid reverse DNS. Instead it's the total score that will cause a rejection. While the encoding in the headers can cause the score to increase on some spam filters it's typically a minor issue. Sounds to me like they are being excessively aggressive with their scoring.
Statistics: Posted by thecoalman — Fri Dec 22, 2023 11:11 pm