@media (min-width: 992px) {
    [data-module-name="mail_mail"] .module-docheader,
    [data-module-name="mail_recipient"] .module-docheader,
    [data-module-name="mail_report"] .module-docheader,
    [data-module-name="mail_queue"] .module-docheader,
    [data-module-name="MailMail_MailMail"] .module-docheader,
    [data-module-name="MailMail_MailRecipient"] .module-docheader,
    [data-module-name="MailMail_MailReport"] .module-docheader,
    [data-module-name="MailMail_MailQueue"] .module-docheader {
        background-image: none!important;
    }
}