SPF Fail for Amazon mails, although mail headers say its a pass

I am not sure how Spamassassin checks SPF, but this mail did pass and fail at the same time!Spamassassin scored a fail, although it passed... This is the complete header of an example: Return-Path:

Re: SPF Fail for Amazon mails, although mail headers say its a pass

Thanks Bill, I will check that! -- Sent from: http://spamassassin.1065346.n5.nabble.com/SpamAssassin-Users-f3.html

Re: SPF Fail for Amazon mails, although mail headers say its a pass

These are the full headers. (Sorry, did not realise all emails get redacted) https://pastebin.com/Z6hkL9hD and the non-forwared mail header too: https://pastebin.com/WGM0aYrh Does not look like SRS (but a good readup, something learned again). I really don't get this. The spf record for 'amazon

Re: SPF Fail for Amazon mails, although mail headers say its a pass

Ahh... I see. So probably other headers are modified by the mail server as well, and that is why SA's SPF check fails! Why would it do that ? I will read up on that. Thank you! -- Sent from: http://spamassassin.1065346.n5.nabble.com/SpamAssassin-Users-f3.html