app/views/announcement_mailer/announce.html.erb
<%= render layout: 'mailer/spacer_table' do %>
<%= render partial: 'mailer/mailer_header',
locals: {
summary: header_summary,
user: user
} %>
<%= render layout: 'mailer/border_table' do %>
<tr>
<%= placeholder_cell('24px', vertical: true) %>
<td>
<table>
<% if body_subheader %>
<tr>
<td style="<%= placeholder_text_styles('font-weight': 'bold') %>">
<%= format_text body_subheader %>
</td>
</tr>
<% end %>
<% if body_header %>
<tr>
<td style="<%= placeholder_text_styles(color: '#333333', 'line-height': '36px', 'font-size': '18px', 'font-weight': 'bold') %>">
<%= format_text body_header %>
</td>
</tr>
<% end %>
<tr>
<td style="<%= placeholder_text_styles %>">
<%= format_text body %>
</td>
</tr>
</table>
</td>
<%= placeholder_cell('24px', vertical: true) %>
</tr>
<tr>
<%= placeholder_cell('24px', vertical: false) %>
</tr>
<% end %>
<table>
<tr>
<%= placeholder_cell('20px', vertical: false) %>
</tr>
</table>
<%= render partial: 'mailer/notification_settings_table',
locals: {
button_url: my_reminders_url,
button_text: I18n.t(:'mail.notification.settings')
} %>
<% end %>