Exclaimer signature messed up due to conflicting table CSS

We are selfhosting Zammad. Connected with MS Graph shared mailbox.

Our signature added by Exclaimer in daily mail traffic looks like this:

If we send an email from Zammad, the result is this:

It appears Zammad’s stylesheets are conflicting with Exclaimer stylesheets. Is this a known issue? Can it be solved, or does a workaround exist? Note Exclaimer adds the signature after Zammad sent it via Exchange mail rule.

Think i found it.

Comment out all the styles in here:
zammad-zammad-scheduler-1:/opt/zammad/app/views/mailer/application_wrapper.html.erb

Example:

<!DOCTYPE html>
<html dir="auto">
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
    <meta http-equiv="X-UA-Compatible" content="IE=edge"/>
    <style type="text/css">
      body {
        ###html_email_css_font###
      }
/*      img {
        outline: none;
        text-decoration: none;
        -ms-interpolation-mode: bicubic;
      }    */