Spam detection from mail sent by local webmail Postfix-Amavisnes-SA

HI,
I've set up ispconfig on debian 10 server for mail purpose following this guide https://www.howtoforge.com/tutorial/perfect-server-debian-10-nginx-bind-dovecot-ispconfig-3.1/
Mymail server has internal IP 10.x.x.x and enternal ip A.B.C.D (NAT1:1)
I've anoter local server with internal IP 10.x.y.y an external ip E.F.G.H (NAT1:1) with a WebMail web applicaiton
All the mail sent from the WebMail are marked as SPAM
X-Spam-Status: No, score=3.314 tagged_above=3 required=4.5
tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1,
DKIM_VALID_AU=-0.1, HELO_NO_DOMAIN=0.001, HTML_IMAGE_ONLY_04=1.172,
HTML_MESSAGE=0.001, RCVD_IN_PBL=3.335, RCVD_IN_SORBS_DUL=0.001,
RDNS_NONE=0.793, TO_NO_BRKTS_NORDNS=0.001, T_REMOTE_IMAGE=0.01]
Question:
1)How to fix it ?
2)How to disable SPAM control on outgoing email from that host 10.x.y.y?
3)How to disable SPAM control on all outgoig mail from the server ?