Here are a few basic tips for your messages and message templates that will make them more likely to pass successfully through spam filters.
- Be sparing with images
- Provide an ‘opt-out’ option
- Avoid promotional style text
- Include real world contact information
- User a spam checker on the message
- If sending HTML, make sure it’s cleanly coded and include a plain text version
- do not attach file types like .exe, .zip, .swf