Redmine/app/views/mailer/_issue_text_plain.rhtml

<%= "#{issue.tracker.name} ##{issue.id}: #{issue.subject}" %>
<%= issue_url %>

<%=l(:field_author)%>: <%= issue.author %>
<%=l(:field_status)%>: <%= issue.status %>
<%=l(:field_priority)%>: <%= issue.priority %>
<%=l(:field_assigned_to)%>: <%= issue.assigned_to %>
<%=l(:field_category)%>: <%= issue.category %>
<%=l(:field_fixed_version)%>: <%= issue.fixed_version %>
<% issue.custom_field_values.each do |c| %><%= c.custom_field.name %>: <%= show_value(c) %>
<% end %>

<%= issue.description %>