app/views/user_mailer/_signature.text.erb
Thank you,
Your TaxonWorks administrators
---
If you have questions about this email please contact an administrator of this TaxonWorks installation (<%= root_url -%>):
<%= User.is_administrator.pluck(:name, :email).collect{|n,e| "#{n} <#{e}>"}.to_sentence(last_word_connector: ' or ') -%>.