remove-gmail--c-geafouvgrmtritrge00053.user.js

// ==UserScript==
// @name      Remove gmail--c@geafouvgrmtritrge000**.com
// @namespace  	
// @description 
// @include		https://inside.kmc.gr.jp/m2w/info*
// ==/UserScript==

var removeSpam = function(){

  Array.prototype.slice.apply(document.querySelectorAll('td.from'))
  .filter(function(item){
    return item.textContent.match(/geafouvgrmtritrge000\w+\.com/)
  })
  .forEach(function(item){
    var tr = item.parentElement;
    tr.parentElement.removeChild(tr);
  })

}
document.body.addEventListener('DOMNodeInserted',removeSpam);
removeSpam();