Fixing DKIM_SIGNED score from -0.1 to positive

Question

i've checked my domain email account with mail tester and i've got

-0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid This negative score will become positive if the signature is validated. See immediately below.

How can I make it positive, because I've got emails going to spam even my domain name is not listed in any of back lists and check score is 10/10. With email's language there are no problems too. But emails still goes to Gmail Spam box.

Here link to check my information: Result from mail tester

Solution

I think, this is ok, as is decribed in test details

This negative score will become positive if the signature is validated. See immediately below.

and below are two lines with positive score, so summary from DKIM check is +0.1