Join several membership free optin email lists. The search will return many free optin email lists for you to join. Join as many lists as you like. We recommend you join lists that allow you to post daily and have a high membership count. If you choose digest, the amount of email dramatically decreases.
Many people have filters set-up on their email programs.
There are many other words that will trigger the filtering system. The above are used the most. When creating your message, get your thesaurus out and look up the standard words. Replace them with unique words that are also well known. If it gets through your system, it will get through many others as well.