I did the spam check and my score is 6/10.
The biggest problem semms to be this line:
-2.775 FREEMAIL_REPLYTO Reply-To/From or Reply-To/body contain different freemails
But I don't know how to fix it because I did put the same email address as sender and reply-to. I think I'm missing something.
Here's the permalink of my test: http://www.mail-tester.com/web-7Er6Dp
Thank you all