diff --git a/app/models/list.rb b/app/models/list.rb
index f64e263..4a0bcd0 100644
--- a/app/models/list.rb
+++ b/app/models/list.rb
@@ -3,7 +3,7 @@ class List
 
   def initialize(id, name, label)
     @id, @name, @label = id, name, label
-    nil
+    nil # rubocop:disable Lint/Void
   end
 
   attr_reader :id, :name, :label
diff --git a/app/models/message.rb b/app/models/message.rb
index 3bf3ad7..661842e 100644
--- a/app/models/message.rb
+++ b/app/models/message.rb
@@ -112,7 +112,6 @@ def from_mail(mail, list, list_seq)
           (($partials ||= {})[match[:id]] ||= []) << self
           raise PartialSaved
         end
-        raise "Unknown content_type: #{part.content_type}"
       else
         raise "Unknown content_type: #{part.content_type}"
       end