Columns widths are wrong on Windows Mail

[rocchidavide]

                          <row class="item item-row" valign="middle">
                            <columns small="12" large="6">
                                <p class="title-row">{{ i18n.item }}</p>
                            </columns>
                            <columns small="12" large="2">
                                <p class="title-row text-right">{{ i18n.quantity }}</p>
                            </columns>
                            <columns small="12" large="2" align="text-right">
                                <p class="title-row text-right">{{ i18n.unitprice }}</p>
                            </columns>
                            <columns small="12" large="2" align="text-right">
                                <p class="title-row text-right">{{ i18n.price }}</p>
                            </columns>
                        </row>

On windows mail, columns widths are all different