app/views/mailer/machine_learning_error.html.erb
<td style="<%= css_for_mailer_content %>">
<h1 style="<%= css_for_mailer_heading %>">
<%= t("mailers.machine_learning_error.title") %>
</h1>
<p style="<%= css_for_mailer_text %>">
<%= t("mailers.machine_learning_error.text") %>
</p>
<p style="<%= css_for_mailer_text %>">
<%= link_to t("mailers.machine_learning_error.link"),
admin_machine_learning_url,
style: "color: #2895F1; text-decoration:none;" %>
</p>
</td>