.popover-email {
    max-height: 50vh;
    max-width: 50vw;
    white-space: nowrap;
    overflow-y: auto;
    overflow-x: hidden;
    padding-right: 1.5em;
    font-size: 12px;
    background-color: #000;
    color: #fff;   
}

.popover-email .arrow {
    display: none;
}