discourse/app/views/email/_post.html.erb

<table class='post-wrapper <%= post.whisper? ? "whisper" : "" %> <%= use_excerpt ? "excerpt" : ""%>'>
  <tbody>
    <tr>
      <td>
        <table>
          <tr>
            <td class='user-avatar'>
              <img src="<%= post.user.small_avatar_url %>" title="<%= post.user.username%>">
            </td>
            <td>
              <a class="username" href="<%=Discourse.base_url%>/users/<%= post.user.username_lower%>" target="_blank"><%= post.user.username %></a>
              <%- if show_name_on_post(post) %>
                <a class="user-name" href="<%=Discourse.base_url%>/users/<%= post.user.username_lower%>" target="_blank"><%= post.user.name %></a>
              <% end %>
              <%- if post.user.title.present? %>
                <span class='user-title'><%= post.user.title %></span>
              <% end %>
              <br>
              <span class='notification-date'><%= l post.created_at, format: :short_no_year %></span>
            </td>
          </tr>
        </table>
      </td>
    </tr>
    <tr>
      <td class='body'><%= format_for_email(use_excerpt ? post.excerpt :  post.cooked) %></td>
    </tr>
  </tbody>
</table>