Email Marketing

What Is Email Blacklisting, and How Can You Avoid It?

Imagine sending out important emails for your business, only to find out they're not reaching anyone. That's what happens when your email gets blacklisted. 
Bella Ward

Imagine sending out important emails for your business, only to find out they're not reaching anyone. That's what happens when your email gets blacklisted. 

Did you know that over 80% of all email traffic is spam? 

In this digital age, where email is a vital tool for communication, being blacklisted can be disastrous. It's like being put on a list where your emails are marked as unwanted. 

But don't worry, there are ways to avoid this. By following simple steps, you can keep your emails out of the blacklist and ensure they reach their intended recipients. 

In this article, we’ll talk about what exactly is email blacklisting and let you know ten easy ways to avoid email blacklisting so that your email marketing efforts stay effective.

What Is Email Blacklisting?

Email blacklisting is when your emails get blocked from reaching your contacts' inboxes. It can happen for various reasons, such as sending emails with misleading subject lines, using outdated contact lists, or not having permission from your contacts to send them emails (known as double opt-in).

Another reason could be having a poor sender reputation, which means your emails are not trusted by email service providers. There are different types of emails, like marketing emails, transactional emails, or newsletters, and each can be affected by blacklisting.

For example, if you use email marketing tools or templates to create your emails, you need to be careful with the content and ensure it's not too spammy or misleading.

Also, if you send emails to a large number of people but many don't open them or click through, it could signal to email service providers that your emails are not valuable, leading to blacklisting.

Using a free email service or email marketing software can help manage your emails better and avoid blacklisting. It's essential to protect personal information and send relevant content to your target audience to avoid being blacklisted and ensure your emails reach your subscribers' inboxes.

What Is Email Blacklisting?

What Does it Mean If You’re Blacklisted?

When you're banned, this means you can't send important emails like advertising campaigns or newsletters. This can lead to big problems because customers might not get updates or even their orders. It's not just a small problem; being banned can hurt your ability to send emails altogether.

And it doesn't stop there. Not being able to send emails can cause cash problems too. If customers don't receive your texts or order confirmations, they might stop using your services or ignore your deals. 

Being on a blacklist isn't something we can make sound better. It can harm how people see your business and make it hard for your emails to reach buyers. Here's what could happen if you're blacklisted:

  • Your emails might end up in people's junk files, making it less likely they'll read them.
  • Your email ads might not work as well, with fewer people reading or clicking on them.
  • Your brand's image could take a hit if people associate your emails with spam or unwanted material. 

Common Reasons For Blacklisting

Understanding the reasons why email services or domains get banned can help you take effective steps to avoid it happening to you. 

Here are 6 of the most popular reasons:

Common Reasons For Blacklisting

1. Spam Complaints

When people mark your emails as spam too many times, it can get you into trouble and end up on a blacklist. This happens because when lots of receivers say your emails are spam, it tells email providers that your emails might not be good or wanted. 

So, it's essential to make sure your emails are helpful and what people want to receive. Our’s email warmup tool makes sure that your email reaches the right audience and doesn’t land up in the spam folder.

2. Bounce Rates

When emails can't be delivered because they're sent to the wrong or non-existing email addresses, it's called a high bounce rate. This can lead to being blacklisted too. It happens if you don't manage your email list well or if you use old or purchased email lists.

3. Spam Traps

Spam traps are like secret traps set up to catch spammers. These traps are email addresses made by email providers to catch people who send spam. 

If you accidentally send emails to these trap accounts, it tells the email providers that maybe you're not following the rules properly. This could get you in trouble and end up with your email address or domain being blacklisted.

3. Spam Traps

4. Security Breach

If hackers break into your email server or domain, they might use it to send loads of spam emails. This can make it look like you're the one sending all that spam, even though you're not. 

As a result, your IP address or domain could get blacklisted until you fix the problem. It's important to keep your email accounts safe from hackers to avoid this mess.

5. Lack of Permission

Sending emails to people who didn't say they wanted them can get you in trouble. This happens if you buy email lists, take email addresses from websites without permission, or add people to your list without asking them first.

Internet service providers (ISPs) want to make sure emails go to people who want them. If they see you're sending emails without permission, they might block you to keep their users from getting unwanted emails.

6. Email Volume

Sending lots of emails in a short time can get a business blacklisted by internet providers or email servers. This might happen if a business suddenly starts sending way more emails than usual or if they send many emails to people who don't open or read them.

Internet providers might think it's spam and stop the business's emails from going through to protect their users from getting too many unwanted emails.

6. Email Volume

Can You Check If You’re Blacklisted?

Yes, you can check if you're blacklisted! Some online tools and services can help you find out if your email server or domain is on any blacklists. These tools work by checking your email reputation against a database of known blacklists. 

All you have to do is enter your domain or IP address, and the tool will tell you if you're on any blacklists. By regularly checking your email reputation, you can catch any issues early and take steps to fix them before they cause problems with your email deliverability.

Checking if you're blacklisted is important because it helps you stay on top of your email reputation and address any issues quickly. If you do find that you're on a blacklist, don't panic! 

There are steps you can take to get removed from the blacklist, such as contacting the blacklist operator and resolving any issues with your email practices. By staying proactive and monitoring your email reputation regularly, you can ensure that your emails reach their intended recipients and maintain a positive reputation as a sender.

How To Avoid Blacklists?

Prevention is the best cure when it comes to email blacklisting. Here are ten steps you can take to avoid ending up on a blacklist:

  • Keep your email list clean by removing old or invalid addresses regularly.
  • Only send emails to people who have agreed to receive them (use opt-in methods).
  • Don't buy email lists from others, as they might contain outdated or fake addresses.
  • Monitor your email deliverability metrics, like bounce rates, to catch problems early.
  • Avoid using spammy language or tactics in your emails.
  • Include a clear unsubscribe link in every email to give recipients an easy way out.
  • Protect your email server and domain with strong security measures to prevent hacking.
  • Be careful not to send too many emails in a short time, as this can trigger spam filters.
  • Follow email marketing laws and regulations to stay on the right side of the law.
  • Stay informed about email blacklistings and regularly check if your domain or IP address is listed.
How To Avoid Blacklists?


For most people who use email every day, blacklisting isn't a big worry. But for businesses, it's something to think about carefully. If you take steps to avoid blacklists, you probably won't have to deal with them. So, businesses need to pay attention to how to stay off blacklists.

By keeping a clean email list, following best practices for email marketing, and staying alert for signs of trouble, you can ensure that your emails reach their intended recipients and maintain your brand's image as a trustworthy sender. 

You can also use’s tools to make sure that emails reach the correct customers and never go to spam folders.

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