that stuff below as subject without trimming is really careless, besides that depending on the mail client you can't see much of the message in the preview window, it's all listed in the content anyways AND in many cases nmail filters would reject mails with ordinary header lenghts (happened often here until i raised the limits *only* for that fedora mails)

Subject: [Fedora Update] [comment] breeze-icon-theme-5.25.0-1.fc24
 extra-cmake-modules-5.25.0-1.fc24 kf5-5.25.0-2.fc24
 kf5-attica-5.25.0-1.fc24 kf5-baloo-5.25.0-1.fc24 kf5-bluez-qt-5.25.0-1.fc24
 kf5-frameworkintegration-5.25.0-1.fc24 kf5-kactivities-5.25.0-1.fc24
 kf5-kactivities-stats-5.25.0-1.fc24 kf5-kapidox-5.25.0-1.fc24
 kf5-karchive-5.25.0-1.fc24 kf5-kauth-5.25.0-1.fc24
 kf5-kbookmarks-5.25.0-1.fc24 kf5-kcmutils-5.25.0-1.fc24
 kf5-kcodecs-5.25.0-1.fc24 kf5-kcompletion-5.25.0-1.fc24
 kf5-kconfig-5.25.0-1.fc24 kf5-kconfigwidgets-5.25.0-1.fc24
 kf5-kcoreaddons-5.25.0-1.fc24 kf5-kcrash-5.25.0-1.fc24
 kf5-kdbusaddons-5.25.0-1.fc24 kf5-kdeclarative-5.25.0-1.fc24
 kf5-kded-5.25.0-1.fc24 kf5-kdelibs4support-5.25.0-1.fc24
 kf5-kdesignerplugin-5.25.0-1.fc24 kf5-kdesu-5.25.0-1.fc24
 kf5-kdewebkit-5.25.0-1.fc24 kf5-kdnssd-5.25.0-1.fc24
 kf5-kdoctools-5.25.0-1.fc24 kf5-kemoticons-5.25.0-1.fc24
 kf5-kfilemetadata-5.25.0-1.fc24 kf5-kglobalaccel-5.25.0-1.fc24
 kf5-kguiaddons-5.25.0-1.fc24 kf5-khtml-5.25.0- 1.fc24
 kf5-ki18n-5.25.0-1.fc24 kf5-kiconthemes-5.25.0-1.fc24
 kf5-kidletime-5.25.0-1.fc24 kf5-kimageformats-5.25.0-1.fc24
 kf5-kinit-5.25.0-1.fc24 kf5-kio-5.25.0-1.fc24 kf5-kitemmodels-5.25.0-1.fc24
 kf5-kitemviews-5.25.0-1.fc24 kf5-kjobwidgets-5.25.0-1.fc24
 kf5-kjs-5.25.0-1.fc24 kf5-kjsembed-5.25.0-1.fc24
 kf5-kmediaplayer-5.25.0-1.fc24 kf5-knewstuff-5.25.0-1.fc24
 kf5-knotifications-5.25.0-1.fc24 kf5-knotifyconfig-5.25.0-1.fc24
 kf5-kpackage-5.25.0-1.fc24 kf5-kparts-5.25.0-1.fc24
 kf5-kpeople-5.25.0-1.fc24 kf5-kplotting-5.25.0-1.fc24
 kf5-kpty-5.25.0-1.fc24 kf5-kross-5.25.0-1.fc24 kf5-krunner-5.25.0-1.fc24
 kf5-kservice-5.25.0-1.fc24 kf5-ktexteditor-5.25.0-1.fc24
 kf5-ktextwidgets-5.25.0-1.fc24 kf5-kunitconversion-5.25.0-1.fc24
 kf5-kwallet-5.25.0-1.fc24 kf5-kwayland-5.25.0-1.fc24
 kf5-kwidgetsaddons-5.25.0-1.fc24 kf5-kwindowsystem-5.25.0-1.fc24
 kf5-kxmlgui-5.25.0-1.fc24 kf5-kxmlrpcclient-5.25.0-1.fc24
 kf5-modemmanager-qt-5.25.0-1.fc24 kf5-networkmanager-qt-5.25.0-1.fc24
 kf5-plasma-5.25.0-2.f c24 kf5-solid-5.25.0-1.fc24 kf5-sonnet-5.25.0-1.fc24
 kf5-threadweaver-5.25.0-1.fc24 oxygen-icon-theme-5.25.0-1.fc24