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How to Spam-Proof Your Email Marketing


The rise of junk mail has naturally mirrored the rise of the web. It’s true that anti-spam methods have grown in sophistication, filtering out more unwanted messages than ever before. But still – one or two uninvited guests manage to slip through the net.

In any industry, it’s essential to ensure your emails don’t get caught in automated spam filters or sent to the spam folder by your recipients. If you don’t prioritize spam-proofing, you risk not only losing out on audience members, but also getting blacklisted by an entire email client like Gmail, AOL, or Yahoo and pre-emptively closing the door on your fundraising and promotional efforts.

Fortunately, there are steps you can take to safeguard your messages. Here are few tips that can help you spam-proof your email marketing and lock down your digital success.


DMARC ( Domain-based Message Authentication, Reporting, and Conformance)) is an email technology that is really important. It’s essentially an email authentication protocol that is designed to give email domain owners the ability to protect their domain from unauthorized use.

Email is involved in more than 90% of all network attacks and without DMARC, it can be hard to tell if an email is real or fake. DMARC allows domain owners to protect their domain(s) from unauthorized use by fighting phishing, spoofing, CEO fraud, and Business Email Compromise.

By always sending DMARC compliant email, the operator of an Internet domain can tell the world “everything I send is easy to identify using DMARC—feel free to drop fake email that pretends to be me.”


Always identify your email as a marketing message (accomplished by adding your logo to the email) and include your physical address in the content or footer. An unsubscribe link is also essential, as is honest messaging (including your subject line). 

Avoid Trigger Words in the Subject Line

Essentially, trigger words are a list of common words and phrases used in subject lines that tip email clients off to whether or not your message is actually relevant to your audience.

The full list of trigger words changes constantly, but there are some words and symbols that remain true over the years:

  • Urgent
  • Take action
  • Get started
  • Free gift
  • Dear friend
  • Click here

When writing email subject lines, don’t:

  1. Write in ALL CAPS
  2. Use less than three words in your subject line
  3. Include excessive punctuation (!!! or …)
  4. Make spelling mistakes
  5. Add RE: in front of your subject line


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