In an effort to fight against spam etc. the following indicators are more and more widespread established: SPF, DKIM and DMARC (search in YouTube for details…)
Please add an option to show these parameters (which are part of the eMail-Header) as optional columns since these a useful indicators to help identify spam and phishing.
Perhaps even allow to use these indicators for rules; e.g. to add color-labels to messages that fail at these tests.
example:
Authentication-Results: mx.xxxxxx.xx;
spf=pass (108.174.3.194;bounce.linkedin.com);
dkim=pass header.d=maile.linkedin.com;
dkim=pass header.d=linkedin.com;
dmarc=pass header.from=linkedin.com (p=reject sp=reject dis=pass);