Among all email deliverability concepts, the one that undoubtedly (🤡) generates the most confusion is spam traps. Not necessarily because people don't know what they are or how they work, but because they misunderstand what they actually mean. A small part of me dies every time I hear someone ask, "Can't we just clean the list to remove the spam traps?"

I’m an email deliverability specialist, and ever since I started working in this field, one of the biggest challenges I’ve encountered has been the persistent misunderstanding of some of the fundamental concepts of email deliverability. I’m not sure whether this happens because the educational material available isn’t clear enough or because these topics simply aren’t given the attention they deserve (personally, I think it’s the latter—we’re all looking for the quickest and easiest solution, but when it comes to deliverability… there isn’t one).

That’s why I decided to write this article in the hope of finally (I hope!) demystifying not only spam traps, but also several other concepts related to email deliverability.

Spam Traps: What Are They, Really?

I believe some of you have never heard of spam traps. But what exactly are they?

Spam traps are, as the name suggests, “trap” email addresses that do not belong to real subscribers. They may be completely fake addresses created by Email Service Providers (ESPs) such as Google, Microsoft or Yahoo, or even addresses managed by anti-spam organisations such as Spamhaus, SORBS or SpamCop.

These are email addresses that have never subscribed to receive communications, let alone confirmed a subscription via Double Opt-In. They are designed to look as much like real email addresses as possible, making them undetectable by email list cleaning services. Their purpose is to allow ESPs and RBLs to identify weaknesses in how senders validate subscriptions and consent. If I never asked to receive your emails and I’m receiving them anyway, then something is clearly wrong with your acquisition process—or you’re simply a spammer!

But I’m Not a Spammer, and I Didn’t Do Anything Wrong. How Did They End Up on My List?

In most cases, spam traps end up in a contact database because the email address or the subscription itself wasn’t properly validated. This can happen in several ways, the most common being:

Lack of Email Address and Consent Validation (Double Opt-In)

If you create a newsletter signup form but don’t send a confirmation email (Double Opt-In) before you start sending communications, you have absolutely no guarantee that the address actually requested to receive your emails. Think about it: anyone can submit whatever they want. These forms are publicly accessible, and if something exists on the internet, it will be attacked.

Forms will receive fake submissions, this is known as mailbombing (notice I didn’t say it might happen; I said it will happen). On top of that, there are simple typing mistakes (typos): someone intends to enter their own email address but accidentally submits someone else’s, or an invalid address that later results in a bounce.

With Double Opt-In, you know the email address is valid (because the confirmation email reached its destination) and that a real person, or at least someone with access to that mailbox, confirmed the subscription and, most importantly, their consent. Double Opt-In is, by far, the most effective way to prevent the majority of deliverability issues and should always be used.

Purchased Lists

I shouldn’t even have to say this: if you’re using purchased email lists, stop.

A purchased list contains contacts who never gave their consent and offers no guarantee that the email addresses are valid. As a result, spam traps are very common in these databases. Using purchased lists is asking for deliverability problems and serious damage to your sender reputation.

Old Lists

Many spam traps are recycled real email addresses. Inactive accounts (such as an old Gmail or Outlook mailbox that is no longer being used) may eventually be deactivated and converted into spam traps. This helps identify senders who fail to maintain their databases and continue sending emails to the same contacts years after they’ve stopped opening messages.

Hitting spam traps doesn’t always mean your list contains invalid addresses. It can also indicate that you’re still emailing old, disengaged contacts who have shown no interest for a very long time.

The same applies to any database imported into E-goi if the contacts were collected without the appropriate precautions. No automatic cleaning service can detect spam traps, so, like any other kind of unwanted data, they inevitably end up in your mailing lists.

OK, I Get It! So Can You Please Remove the Spam Traps from My List?

Whenever someone asks me this question, my first reaction is to feel a slight shiver (😟). But I’ll take a deep breath and explain why this question doesn’t really make sense.

I hear this all the time, almost always from people who haven’t considered what the existence of spam traps actually implies. Perhaps that’s because many people misunderstand their real purpose. No, spam traps don’t exist to ruin your sender reputation, they exist to help you. They should be seen as a very useful tool for anyone responsible for email campaigns. ESPs are helping us identify weaknesses in our acquisition process, so instead of asking “How can I remove spam traps?”, we should be asking “How did they get into my database in the first place?”

If you know that a particular list contains spam traps, then you should assume the source of those contacts is problematic. Every other contact collected through that same source should immediately be questioned, and until the issue has been resolved, you should stop sending emails to that database.

Next, investigate how those contacts were collected and strengthen your acquisition process:

• Enable Double Opt-In (it’s virtually foolproof and should always be enabled).
• Add CAPTCHAs to your signup forms.
• Use every email validation tool available to you (including those included in your E-goi account).

So Should I Ignore and Remove Everything That’s Already in My Database?

If the source of the list is questionable, then yes, that’s often the safest approach (although not the only one).

I know that’s probably not what you’d like to hear, but if you want to maintain a good sender reputation and follow email deliverability best practices, any contact for whom you do not have confirmed proof of consent should be considered unreliable.

However, that doesn’t necessarily mean deleting everything and starting from scratch. There may be additional information that allows you to recover some of those addresses.

For example, if your website has a user account area where registration requires email verification, then you already know that every active account belongs to a valid email address. That information can be used to safely reactivate contacts.

Likewise, data such as the date of the last login or other recent activity can help identify subscribers who are still relevant.

Another good practice is to deactivate contacts who haven’t interacted with your emails recently (opens or clicks), or better yet, create separate communication flows for inactive subscribers.

Mass deactivation may be too extreme (unless the list is very old and has never been properly maintained). A better approach is to create a dedicated flow that significantly reduces the sending frequency for subscribers who no longer open or interact with your emails, use campaigns with stronger incentives, and finish with one final message asking whether they still wish to receive your communications. Only then should you deactivate them.

It’s worth noting that these recycled spam traps usually originate from email addresses that have been inactive for years. At that point, it makes little sense to continue sending them emails anyway.

As a last resort, you can gradually run subscriber re-engagement campaigns. A campaign asking subscribers whether they’d like to continue receiving your communications can effectively act as a delayed Double Opt-In, making it an excellent strategy for recovering a questionable list.

However, this must be done carefully and gradually, ideally mixed with your regular campaigns, so you avoid sending one massive campaign to the entire problematic database at once, which would only create additional reputation issues.

What About Email Addresses That Haven’t Been Confirmed but Belong to Customers I Have an Active Business Relationship With?

If there was no Double Opt-In confirmation, then you still have no guarantee that the email address exists, belongs to the person you intend to contact, or is even correct.

So yes, the issue remains the same.

You can always run a delayed Double Opt-In campaign. It doesn’t have to happen when the address was originally collected. You can even hide it within a regular campaign, just be creative. The important thing is that it results in a genuine human action confirming both the email address and the subscription.

(This consent aspect may not apply where there’s already an active business relationship, depending on the legal basis you’re relying on, but confirming that the email address itself is valid remains extremely important.)

In Summary

Spam traps are not enemies that need to be removed. They are clear indicators that something is wrong with either your acquisition process or the maintenance of your mailing lists, and that’s where your efforts should be focused.

The same applies to blacklist listings. There’s no point requesting removal if you don’t fix the underlying problem first. In fact, repeatedly requesting delisting without addressing the root cause will simply result in you being listed again, and eventually ESPs and blacklist operators may refuse to remove you altogether.

Your priority should always be to identify and fix the issue that caused the problem in the first place. Once that’s resolved, then you can request removal from the relevant blacklists.

In email deliverability, those who only treat the symptoms will continue facing recurring problems, develop a poor sender reputation, and never achieve consistently good sending results.

Only those who address the root cause build, and maintain, a strong, sustainable sender reputation.

You’ve been warned. 🙂

I hope you now have a much better understanding of what spam traps really are and, above all, why your focus should always be on preventing them from entering your database in the first place, rather than simply dealing with the consequences afterwards.