Postfix started to fail, cant send messages, but can log

First of all, the server was working until now, and i don't even know why this started to fail, but since several hours, i cannot send messages between users,

i bet it's not a fail in the certificates, cause it was working yesterday with them and didn't changed

this is what i see on client side

image1

"An error occurred while sending mail. The mail server responded: 5.7.0 Must issue a STARTTLS command first. Please ensure that you are using the correct identity to send and that the used authentication method is correct. Verify that you are allowed to send via this smtp server with your current credentials from your current network"

and while searching the messages of postfix, i found this

image2

the part that worries me is this, "warning: group or either writable: /etc/postfix./postfix-script warning: group or either writable: /etc/postfix/main.cf.proto" etc etc show tis for every file in /etc/postfix

Could this be the problem? How can I solve it?