app/views/coach_mailer/course_enrollment.html.erb
<% content_for :salutation do %>
<%= t("shared.salutation_name", name: @coach.name) %>
<% end %>
<% content_for :body do %>
<p>
<%= t("mailers.course_enrollement.added_coach_html", course_name: @course.name, school_name: @school.name) %>
</p>
<% end %>