Quote the from address explicitly as rails seems to be failing to do

it, though it looks like it should from a quick glance at the source.

app/models/notifier.rb

@@ -112,7 +112,7 @@ private
 
   def from_header(name, type, id, digest)
     if domain = APP_CONFIG['messages_domain']
-      from "#{name} <#{type}-#{id}-#{digest[0,6]}@#{domain}>"
+      from quote_address_if_necessary("#{name} <#{type}-#{id}-#{digest[0,6]}@#{domain}>", "utf-8")
     end
   end
 end