How To Start Removing Invalid Email Addresses From Your Email List

Removing Invalid Email Addresses From Your Email List

Published on December 24th, 2021

Sending emails in mass is costly and risky. If your list is filled with valid and invalid email addresses, you risk sending emails to users that don’t exist. Unfortunately, you’ll still be required to pay for the emails that bounce.

If you don’t know how to block invalid email addresses, we’re going to cover the process in great detail in the coming paragraphs.

What Is Email Validation And Do You Need It For Your List?

Email validation is a way to trim down your email list. If you have just a few subscribers on your list, you can often perform validation manually with a quick assessment of the emails that bounce or go to invalid emails.

Validation is a way of removing invalid email addresses.

Often, email signups occur to receive a free eBook or item, and then the person deletes the account after they receive whatever it is they were interested in initially. However, with validation, you’ll:

  • Check all accounts
  • Remove accounts that fail

Failed accounts don’t necessarily mean that the person’s email account no longer exists. Emails can be invalid for numerous reasons, such as being a catch-all account, mails flagged as abuse or spam and others.

If the recipient’s email provider continues to flag your mail as spam, it’s considered a negative mark on your account.

When you send out emails, you want the failure rate to be very low. The only way to ensure a low failure rate is to validate your list.

If you’re not considering email validation, there are risks that you must consider, including:

  • Lower credibility
  • Lower sender reputation

Unfortunately, many list owners don’t go through the process of blocking invalid email addresses and their reputation score falls. Eventually, a score can fall so low that all mails that you send end up in a person’s spam folder.

No one takes the time to scour their spam folder for your emails.

You can send 1,000 emails to list subscribers, but if your emails are flagged as spam, your open rates will be non-existent.

So, if you want to enjoy the highest open rate and potential to have your mails convert, it’s crucial that you find ways to remove invalid email addresses systematically.

Easy Ways To Remove Invalid Email Addresses

Removing inactive users manually is an option for list owners, but it’s very resource intensive. Thankfully, there are a lot of automated alternatives that can help you invalidate email addresses.

A few of the ways to remove invalid email addresses, include:

  • Bulk Validation. If you already have a list, you’ll need to use a service that can verify emails in bulk. These services can scale to the size of most lists, and they will use numerous indicators to discern which emails to leave in place and which to remove.
  • Real-Time. By utilizing an email validation API, it’s possible to verify email addresses in real-time. Then, when someone signs up for your list, their email will be checked and validated. As you can imagine, real-time validation is powerful and often preferred to using multiple bulk validations.

Most list owners will opt to perform a bulk validation first and then follow up with real-time validation. The goal is to remove all of the bad subscribers from your list initially and then keep the list clean with real-time validation.

Removing these bad and invalid email addresses allows you to maintain a list that is highly engaged and wants to receive your offers.

Over time, you’ll find that putting these automated systems in place will provide a powerful way to stay engaged and continue to nurture the people most interested in your list.


Email lists are exceptional if you want to keep in close contact with leads, nurture them and make money. However, if your list is older or you don’t have high-quality subscribers, the list can become stale.

Additionally, there’s also a risk that a lot of emails will become invalid and lead to poor sender scores.

If you use email validation properly, you can maintain a healthy email list that is waiting for you to nurture it. Over time, you’ll be able to build a list that is engaged and just waiting for your next mail to hit their inbox.