You’ve built your Email list. Crafted the perfect message. Checked every link twice. Now you’re ready to hit “Send.”
But here’s the real question: will your Email land in the inbox—or disappear into the spam folder?
As Email marketing grows, so does spam. In fact, a massive portion of global email traffic is classified as spam. That means inbox providers are stricter than ever. Even legitimate marketing Emails can get filtered out if certain best practices aren’t followed.
Landing in spam doesn’t just hurt one campaign—it damages your sender reputation, lowers engagement, and impacts future deliverability.
The good news? Avoiding spam filters isn’t complicated if you understand how they work. With the right approach to authentication, content structure, list hygiene, and sending practices, you can significantly improve your chances of reaching the inbox.
Here are practical ways to keep your Emails out of spam—and in front of your customers.
Keep your Emails out of spam
1. Avoid spam-flagging words or punctuation in the subject line:
Did you know that certain words and symbols could send your email to spam land? It’s true.
Expletives, over usage of punctuation marks, dollar signs and all caps are among the items that should be avoided in subject lines and within email content as well. You should also avoid deal-based wording such as free, cheap, increase, buy, money, chance, ad, offer and credit. They send up a red flag trapping your email in the spam folder.
2. Select an email service provider that offers an anti-spam feature:
Make sure you’re using an email service provider that offers spam protection. Reputable email service providers should have tools, like a service that has spam-check option for your subject line, for you to use. Features like this can help increase delivery rates for your email campaign.
3. Create relevant content:
Customers have the ability to mark messages they receive as spam, which could happen if the subscriber doesn’t consider the content relevant, or they receive correspondence too often.
Once a customer marks an email as spam, the spam filter might catch future emails. Explore an option of letting customers decide how often they receive your emails.
Provide balanced, consistent content. Mix up your content material with both text and photos that are engaging, while continuing to highlight the message you want to convey.
Offering this personal touch and observing customer preference and behavior can help the customer feel connected to your business and more likely to engage in future emails – decreasing the possibility of your email being marked as spam.
4. Test your email:
When you’re trying to determine which email campaigns work best, don’t be afraid to test different formats and analyze the results to maximize delivery.
You can A/B test various components of your email that will not only increase delivery rates, but your overall efficiency.
To conduct an A/B test, or split test as it’s sometimes called, you’ll send emails to two small groups of people on your email list. Let’s say you want to test your subject lines. Each group receives the same email, but with different subject lines. Watch your open and click-through rates to see which one does best.
How do you ensure your emails are delivered to an inbox and not a spam folder? Share your thoughts in comments below.