Checking Content for Spam Characteristics

There are a lot of factors involved when determining why a mailing is classified as spam and content is just one component. If you have ruled out other factors and think that the content is causing your mail to be classified as spam, then the checklist below should help to rule out some major spam triggers:

  • Make sure exposed URLs are covered by text or an image; receivers/filters can sometimes misconstrue as a phishing attempt because our system uses click tracking URLs.
  • Avoid using 3rd party short links such as '' or 'tinyurl' as they are typically blacklisted.
  • Check all other websites used in your mailing to make sure they are not blacklisted.
  • Avoid large images, excessive images, and too little text in the mailing (we advise against image mapping).
  • Avoid using PDF download links or any executables
  • Make sure the text and background colors are not similar. Spammers will hide text in an email by matching the text color to the background color, so be sure to use a font color that stands out.
  • Add alt tags to all of your images (spacers, etc. do not need alt tags)
  • Avoid dangerous html elements such as javascript, iframes, embeded content or applet.
  • Avoid excessive punctuation, caps, hyphens, etc in the body and subject line of your mailing.
  • Avoid common spam trigger words in the body and subject line.
  • Provide an easy way for recipients to unsubscribe from your mailings (unsubscribe link is required for all emails).
  • You can also run your own content checks through the mail tester tool to provide additional insight.
  • You could send a copy of the mailing to your own email accounts to see how they are being classified (,,, etc).