There are a lot of automatic search engine submission services on the Net. But you should look upon them with suspicion. Search engines don’t like these services and may ignore or at least “red-flag” automated submissions.
Many free website submission services even fail to look for a “success” message after the submission is made. So, just to be on the safe side, you should submit your site manually or use a submission service or software that completely mimics a common browser.
Here’s a safe, quick, and free website submission service. It can help you submit your site to the major search engines and directories that account for about 95% of your traffic.