Mailinglist Name
<%= text_field 'mailinglist', 'name' %>

Select User:
<% if @users %> <%= options_from_collection_for_select(@users, "login", "login", @selected) %> <% end %>

Class:
<% if @mailinglist_classes %> <%= options_from_collection_for_select(@mailinglist_classes, "id", "name", @selected) %> <% end %>

Description: <%= text_field 'mailinglist', 'description' %>