What is Email Verification and How It Works

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What is Email Verification
Nov 24, 2023

Email verification is the verifying process to make sure that your emails are ready to deliver. Every email marketer wants safe delivery of emails directly to the recipient’s inbox. We can’t deny, that delivery of every email helps in higher lead generation, higher sales, and more profit.

Verifying your email is a part of a successful email marketing campaign. Email verification is not only the way to ensure 100% delivery of your email, but it is most important. So, let’s understand what is email verification, how it works, and why you must require email verification. 

What is email verification?

Email verification is the process of confirming the validity of an email address to ensure the email has come from the real user. Email address validity helps to receive messages from other senders. 

The verification process involves several steps including syntax, domain, catch-all, email address, and MX record checks. Because syntax check ensures the email address follows the correct format, domain check verifies the domain’s existence, MX record check validates the mail exchange records, and catch-all check ensures the domain accepts emails. 

The terms “email verification” and “email verification” are often used interchangeably. But we can define Email validation more precisely. Email validation is like the final report you get after checking if an email is okay. It tells you if the email is good to go (“valid”), has a problem (“invalid”), or if it’s hard to tell (“unverifiable”). 

Why is Email verification important?

There are many important reasons for email verification. 

Keeping Email Lists Fresh

Email verification helps in identifying and removing invalid email addresses. Marketing Sherpa research shows that B2B data decay happens at an annualized rate of 22.5%. Many time this happen naturally due to various reason like a change in the company name, using a better email address, email address being deactivated, etc. 

Reduce hard bounce

Because email verification helps to reduce hard bounce by eliminating invalid email addresses. If your hard bounce is higher, it can be a major cause of the sender’s reputation falling. When the bounce rate surpasses a certain critical point, there’s a risk of the sender’s account being blacklisted.

Maintain Sender’s Reputation

Maintaining the sender’s reputation is important to ensure continuous delivery of email. Higher bounce rate, spam report rate, abusive email content, and sender’s habits can affect the sender’s reputation. Using email verification services regularly in your marketing helps you keep a good sender reputation and steer clear of blacklists.

How an Email Verification Process Works

The working process of email verification includes checking various things like email addresses, syntax error finding, domain, catch-all, MX records,  etc. These email verifiers work in a step-by-step process. 

Email verifiers just took a few minutes to check thousands of emails at once. If the checking process goes well, it ensures higher email delivery while maintaining domain reputation. 

Syntex error and format

Verification of email starts by checking your email address. They verify, is your email address is correctly formatted with the “@” symbol, domain name, and domain extension (e.g., “.com”). 

Like: [email protected]

Domain Check:

This step ensures that your domain name is legitimate and capable of receiving emails. For that, it checks your DNS record to confirm your domain name. 

This is important because many domains are expired, email addresses are not in use, and companies are delisted. 

MX Record Check:

MX Record Check is a step to confirm the existence and validity of Mail Exchange (MX) records for a domain. This specifies the mail server that is responsible for receiving emails for a specific domain. This record contains the verified email address. 

Catch-All Check:

A catch-all domain is a type of domain that accepts every mail even if you use random or nonsensical words before the “@” symbol in the email address. These catch-all email addresses can impact the bounce rate and the sender’s reputation. The tool helps to identify catch-all email addresses and it’s better to remove them. 

Checking for Spam Traps:

This makes sure your email list doesn’t have fake email addresses. If you accidentally send emails to these spam traps, they can lead to problems. So, email verifiers detect these spam email addresses and remove them to send emails to the right email addresses without affecting the sender’s reputation.

Ping or SMTP Check:

Ping or SMTP checks are ways to see if an email address is working. Here, email verifies sends a network ping to the mail server and checks its response to identify the working of the email. If the email reacts, it’s active, and you can send real emails to it. This is also called SMTP authentication.

Get Help From a Trusted Email Partner

If you are still confused or don’t have enough technical knowledge, you can get help from Mailerday’s experts. Our email marketer has years of practical experience in setting up a successful email marketing campaign. They can help completely from creating an email template to setting up email automation. 

At Mailerday, we can help with email authentication, maintaining a fresh email list, tracking email, and improving email deliverability. We ensure direct communication and transparency with our valued customers. 


Email verification takes only a few minutes to check your email list. This process can identify invalid email that makes no sense to send email to them. So, you can remove them which helps to improve email delivery, maintain the sender’s reputation, and reduce hard bounce. Higher delivery of emails helps in improved sales, reducing spending, higher leads, and better ROI. 

If you do not know how to verify, you can explore our services and directly contact us. 

Mailerday is a Perfect Email Marketing Service provider to grow your business. You can either hire our Email Expert or use our email services including SMTP service, email verification, a bulletproof server, & DMCA-ignored bulletproof service. All services are affordable and have 24/7 support.


How Long Does Email Verification Take?

The time for email verification depends on the tool, server speed, and the number of email addresses. It can range from a few seconds to a few minutes for large lists. Some services offer real-time verification for individual emails.

Do email verifier, email checker, email validator, or email tester mean the same?

You might hear different terms like email address checker, verifier, validator, or tester. They usually mean the same thing – a tool to check if an email address is valid. But, be careful not to confuse it with an email spam checker, which looks for issues that could make your email end up in spam.

When Should You Verify Email Addresses?

It is advisable to verify email addresses before sending marketing campaigns, newsletters, or important communications. Regular verification also helps maintain a clean and up-to-date email list.

How to Check an Effective Email Validator Among Many Email Verification Tools?

Look for a tool that offers comprehensive checks, including syntax, domain, and SMTP verification. Consider user reviews, customer support, and the tool’s ability to handle your specific volume. A reliable tool provides accurate results, reduces bounce rates, and helps maintain a positive sender reputation.