.tooltip {
  position: relative;
  display: inline-block;
  border-bottom: 1px dotted black;
}

.tooltip .tooltiptext {
  visibility: hidden;
  width: 120px;
  background-color: black;
  color: #fff;
  text-align: center;
  border-radius: 6px;
  padding: 5px 0;

  /* Position the tooltip */
  position: absolute;
  z-index: 1;
}

.tooltip:hover .tooltiptext {
  visibility: visible;
}
.info {
  background-color: #e7f3fe;
  border-left: 3px solid #2196F3;
  font-size:.8em;
  display:inline;
}
/*<div class="tooltip">info
    <span class="tooltiptext">Email will be used to recover the password</span>
</div>*/