Why is My Email Going to the Spam Folder?

Email deliverability is more complicated than you might think. But even so, there are a few main reasons why your messages might end up in the Spam folder!

In this tutorial, we'll cover the 4 primary "Spam factors" that impact your deliverability, including:

Plus, we'll also cover how testing your emails can help you identify exactly what the issue is if you're struggling to get your messages to inbox!


Content

Pre-Written Templates

When it comes to the content of your emails, your goal is to always stand out, so: make sure your email content is original to you!

When email providers see many different senders trying to deliver the exact same content to people, they have programs set up to analyze and detect that type of behavior and will stop inboxing your emails entirely. 

Anytime you’re provided with done-for-you content, you need to rework it before sending. You can use the pre-made content as a guide, but make the emails your own to help increase your deliverability.

Email "Curse Words"

In addition to crawling for duplicate content, email providers also have filters on specific words that are frequently seen in spam emails.

For a more complete list of the top 328 words you should avoid in your emails, check out the Email Curse Word Database. While you are following this list, remember: your goal is always to stand out!

Please Note

While it’s true that spam filters look specifically for these words, the chances of your messages being marked as spam will differ based on your own sending reputation. Maintaining your sender reputation with a hygienic and engaged list is key to being able to use these words more freely!

Imagery, Formatting and Special Characters

Adding a lot of text formatting (like bold, italics, different sizes or colors) and special characters or punctuation (like !!, $$, ... or ==>) is a huge red flag for spam filters.

Stock images that are available online for anyone to use are another great way to get flagged for duplicate content. 

Start off sending simple messages with fewer images and text modifications. And be sure to use original images (like your own logo and product photos) for best results.

Please Note

Once you've built up your sender reputation with a few sends that engage well, your content will start to inbox more consistently and you can start sending more "fancy" messages.


Subject Lines

Subject lines are actually more important than the body of your messages!

When you think about grabbing your audience’s attention, you should always go for shorter and more compelling sentences. Be honest about what’s in the email, be clever and grab attention with just 5 words or so.

Avoiding words in the Email Curse Word Database is important when crafting subject lines as well.


Links

Masking Links

You should always avoid displaying a raw link. More people click on embedded links than raw links, so be sure to embed your links in text or in a button! 

Follow our guide here to learn more about how to mask your links.


Email Address Issues

As an email marketer, you need to establish where you're sending from. 

Building up a healthy sender reputation is very important!

According to DMARC’s most recent legislation, in order to send marketing emails, you are required to have your own domain-based email address, backed by a corporate website. DMARC is the email validation system that helps prevent email abuse including spam, phishing, fraud and other email-based scams. 

If your business domain is brand new, your domain is essentially a blank slate. Similar to how a credit score starts off very low before you've built up credit, you improve your rating showcasing responsible spending. You also need to build up your domain/sender reputation with responsible  sending!

When your "from" email address is unknown to Gmail and other providers, algorithms set up to detect spam will be monitoring the address, subject line, and content of your emails very closely. 

Please Note

If you have multiple Spam complaints against your domain or a poor sender reputation, you will have a hard time inboxing any of your campaigns - regardless of the content. 


Testing Your Emails

Testing is one of the most important parts of the email marketing process. It helps ensure that the messages you send will actually be delivered to your recipients - and that everything looks the way you want it to.

If you don’t test, your emails may end up in your contacts' spam folders without you ever knowing it!

How to Test

  1. Start by making sure that your “from” email address is not in your address book or whitelisted (this will skew your test)
  2. Create new "test email" accounts in Gmail and Yahoo (these are widely used services) to send test emails to
  3. Build your email (subject line, content, links, etc.)
  4. Once your email is ready, click the Send a test email button to send yourself a copy
  5. Check to see where your test email lands
    • If you find it in your inbox - great! You can stop testing and send away!
    • If you find it in your spam folder, it's time to revisit the list of Spam factors one-by-one
  6. Revisit your content
    • if you started from a template, rework the text so it feels more unique
    • check to be sure you're not using anything listed in the curse word database
    • simplify your formatting and remove special characters or images
  7. Once you've made changes, repeat Steps 3 and 4. 
    • If your new version still lands in spam, keep testing:
  8. Tweak your subject line, then send another test
  9. Check your links and send a new test
  10. Swap out the email address in your sender profile and send another test

Additional Resources

Our main goal at Sendlane is to help you succeed! We have lots of resources available to you to stay up to date on the latest email marketing policies and trends, as well as tips, tricks and best practices:

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