Index: app/models/mail_handler.rb
===================================================================
--- app/models/mail_handler.rb	(revision 17870)
+++ app/models/mail_handler.rb	(working copy)
@@ -536,11 +536,9 @@
   # Creates a User for the +email+ sender
   # Returns the user or nil if it could not be created
   def create_user_from_email
-    from = email.header['from'].to_s
-    addr, name = from, nil
-    if m = from.match(/^"?(.+?)"?\s+<(.+@.+)>$/)
-      addr, name = m[2], m[1]
-    end
+    from_addr = email.header['from'].addrs.first
+    addr = from_addr.address
+    name = from_addr.display_name || from_addr.comments.first
     if addr.present?
       user = self.class.new_user_from_attributes(addr, name)
       if handler_options[:no_notification]