将以下内容添加到functions.php 当前主题的（首选子主题！）：

CSS solution:

function no_email_changes_in_profile() {
    $screen = get_current_screen();
    if (\'profile\' == $screen->base && !current_user_can(\'manage_options\')) {
        echo \'<style>
input#email {
    pointer-events: none;
}
</style>\';
    }
}
add_action(\'admin_head\', \'no_email_changes_in_profile\');

jQuery solution:

function no_email_changes_in_profile() {
    $screen = get_current_screen();
    if (\'profile\' == $screen->base && !current_user_can(\'manage_options\')) {
        echo "<script>
jQuery(document).ready(function($) {
    $(\'#email\').prop(\'readonly\', true);
});
</script>";
    }
}
add_action(\'admin_head\', \'no_email_changes_in_profile\');