app/views/user_mailer/add_email.html.erb
<p class="lead">
<%= t('user_mailer.add_email.header') %>
<%= t('user_mailer.add_email.footer', confirmation_period: @confirmation_period) %>
</p>
<table class="button expanded large radius">
<tbody>
<tr>
<td>
<table>
<tbody>
<tr>
<td>
<center>
<%= link_to t('user_mailer.email_confirmation_instructions.link_text'),
@add_email_url,
target: '_blank',
class: 'float-center',
align: 'center',
rel: 'noopener' %>
</center>
</td>
</tr>
</tbody>
</table>
</td>
<td class="expander">
</td>
</tr>
</tbody>
</table>
<p>
<%= link_to @add_email_url,
@add_email_url,
target: '_blank',
rel: 'noopener' %>
</p>