When you implement much better search engine optimization practices, you will be able to avoid the spam filter. SEO is very valuable when it comes to email because it allows you to have a unified voice with your brand. You also should start using long tail keywords because 40% of all search traffic is driven by them. These are very valuable in email marketing as well as they tell your target audience actual information about your product and/or service.
- Be careful not to use Spam trigger words such as "Urgent", "Act now", etc.
- Try to avoid words and phrases that Spam may think as shady ex: Social Security number.
- There are various tools nowadays to help the marketing department check their outgoing email for trigger words.
"Inbox providers flag certain words in the body of the email, subject line, from address, and/or preview text to notify them that the message may be unsafe."