Are you unsure how to select an email-address verification tool or app? Or wondering which type of business should use one?
An email-address verification tool or app automatically detects invalid addresses and cuts off the process before unwanted registrations or orders proceed.
If invalid email addresses are registered, not only may newsletters fail to reach the recipient, but deliverability can decline and fraudulent orders may occur.
In this article, we explain:
- Why you need to verify email addresses
- Which businesses should adopt verification tools
- How to select the right tool
We recommend this read for any business that captures email addresses during registration.
目次
- 1 1. Three Key Criteria for Selecting an Email-Address Verification Tool or App
- 2 2. Recommended Tool: “Mail Validator”
- 3 3. Why Verify Email Addresses? Four Main Reasons
- 4 4. Which Businesses Should Use Email-Address Verification Tools?
- 5 5. What to Do When You Detect Invalid Email Addresses
- 6 6. Frequently Asked Questions (FAQs) Regarding Email-Address Verification Tools
- 7 Summary
1. Three Key Criteria for Selecting an Email-Address Verification Tool or App
Here are three essential criteria to keep in mind when choosing an email‐verification tool/app.
1. Wide-ranging detection of invalid email addresses
It’s critical that the tool can accurately identify invalid addresses. These include non-existent addresses, disposable/throw-away addresses, and alias addresses. The tool should have a broad database and up-to-date algorithms to ensure detection accuracy.
For example, non-existent addresses may result from mistyping or deliberately false inputs. If many such addresses are registered, there’s a risk that your email-sending domain is flagged as spam.

2. Ability to integrate with your existing e-commerce or membership system
When selecting a tool, check whether it can integrate smoothly with your existing EC or membership system. Having seamless integration enables unified customer-data management and improves operational efficiency.
3. Reasonable cost and value for money
Cost-performance is important. A tool should not only be affordable but also deliver sufficient functionality and support. Consider whether the service level (accuracy, support, updates) justifies the cost.
2. Recommended Tool: “Mail Validator”
If you’re looking for a reliable email-verification tool, we recommend “Mail Validator,” offered by our company.
“Mail Validator” enables rapid verification of email-address validity, future-proofing your email-communications and helping prevent fraudulent orders in EC.
Key features include:

Furthermore, Mail Validator allows effortless integration with existing systems, particularly ensuring smooth compatibility with e-commerce sites and membership platforms.
This automation of email address verification during customer registration helps prevent fraudulent sign-ups and orders in advance.
Please refer to the diagram below for an illustration of system integration and usage.

3. Why Verify Email Addresses? Four Main Reasons
Here are four reasons why verifying email addresses is essential.
Reason 1: To ensure important newsletters reach recipients
By verifying addresses, you reduce the risk of sending to invalid addresses and improve deliverability. This supports timely delivery of promotions and important updates.
Reason 2: To ensure later communication by email is possible
Ensuring a correct email address allows for smooth communication, especially when transactional or customer-support communications are required.
Reason 3: To prevent decline in send-domain reputation
Sending to many invalid addresses can result in the sending domain being flagged as spam, reducing overall deliverability. Regular cleaning via verification tools helps maintain email-sending quality.
Reason 4: To prevent fraudulent orders
On EC sites, invalid or disposable email addresses may facilitate fraudulent registrations, referral-system abuse (multiple accounts for rewards), or multiple applications for limited items. Verification tools can help block such risk.
4. Which Businesses Should Use Email-Address Verification Tools?
Here are four types of businesses that should consider implementing these tools.
- All businesses that collect email addresses at the time of member registration.
- Businesses that send newsletters and want to verify addresses before sending.
- Businesses that want to clean up their existing email-address list in bulk.
- EC operators who want to prevent fraudulent orders.
5. What to Do When You Detect Invalid Email Addresses
If you find invalid email addresses, here are three recommended actions.
Action 1: Contact the registrant if confirmation is needed
If email communication is necessary (e.g., for verification), contact the registrant by phone or other means to confirm the address’s correctness. This helps maintain accurate data and customer relationships.
Action 2: Remove the address from the newsletter list
Invalid addresses should be removed promptly from mailing lists to avoid being flagged as spam and harming sender reputation.
Action 3: Use a verification tool at registration
For large lists or high-volume registrations, automatically verifying email addresses at the time of registration prevents invalid addresses from entering the system. This reduces manual workload and improves data quality.
6. Frequently Asked Questions (FAQs) Regarding Email-Address Verification Tools
Below are some common questions from both operators and users regarding email-address verification.
Q1: Can you use alias emails in E-Commerce registrations?
Some E-Commerce sites disable alias emails. It is advisable to check the registration policy of each site.
Q2: What kinds of addresses get flagged by verification tools?
Addresses that are non-existent, alias addresses, or disposable domains are typical. Addresses flagged for spam or black-list association may also be detected.
Q3: What happens if your address is flagged by the verification tool?
You might lose access to campaigns or communications; the operator may contact you by phone or SMS. Confirming accuracy at registration is important.Did you forget your purchase
Summary
Email-address verification tools are essential for any business that collects email addresses and sends communications. They help improve deliverability, maintain sender reputation, and prevent fraudulent orders. When selecting a tool, three key criteria are: broad detection capability, system integration, and cost-effectiveness.
For EC operators especially, tackling invalid email addresses at registration and maintaining clean lists is a vital part of fraud-risk management.
If you are interested in “Mail Validator” or want to learn more about how to implement email-address verification, feel free to contact us.



















