Do not try to send notification e-mails for reblogs if the reblog is not of a

local account

app/services/process_feed_service.rb

@@ -76,7 +76,7 @@ class ProcessFeedService < BaseService
 
     if !status.reblog.nil?
       status.save!
-      NotificationMailer.reblog(status.reblog, status.account).deliver_later
+      NotificationMailer.reblog(status.reblog, status.account).deliver_later if status.reblog.local?
     end
   end