Frequently Asked Questions

Listed questions and answers, all supposed to be commonly asked in some context, and pertaining to a particular topic.

General Questions

I'm considering to use your email validation service but I'm concerned about the privacy of my data.
DeBounce is a service operating according to EU General Data Protection Regulation (GDPR) standards.
We do not process or store email addresses for any purpose other than validation.
We do not share any client data with any third party at any time.
We retain personal data processed on behalf of our clients for as long as needed to provide services to our clients.
All data from API requests and batch/list processing will be deleted upon your request.
Is there any risk that our IPs and domains get blacklisted by using your service?
All processing is done on our servers, your IP addresses and domains are not affected in any way by the DeBounce service - absolutely no blacklisting risk for your IPs and domains.
A valid email address just bounced. How can this happen?
DeBounce only tests if the recipient address exists. It does not test the anti-spam policies employed at the receiving mail server, as no mail is actually sent.

Make sure your mail server's DNS data contains valid MX, PTR and SPF records,
the sender address exists and mail to this address is accepted by your server.
Also, in order to send email reliably, your mail server needs to have a good reputation. Cleaning your email lists before you start a new email marketing campaign of course helps a lot.
What is the maximum upload file size or maximum allowed number of emails per list?
The maximum number of emails per list is 200,000. If your list is larger, please shrink it.
Do I need to install any software to use DeBounce?
No, you don’t. From the moment you upload your email lists, DeBounce will take care of the entire process. Once you’ve set up an account with us, you can upload your lists directly from your browser.
How often should I verify my emails?
Large lists should be checked at the very least, once every two weeks. Smaller size lists can be checked on a monthly basis.
How important are clean email lists?
Very important! Clean email lists ensure that your email marketing strategy doesn't go to waste. If you send your next campaign out to unverified and outdated emails, you’ll find that you have a very low conversion rate as well as unreliable data. With a clean list, however, you’ll only be sending your email out to fully verified addresses, allowing you to communicate directly with your core customers and shape your email marketing efforts around them.
How Does the Email Verification Process Work?
Our algorithms have been specially designed to use tools such as; Domain Validation, Syntax Verifier, Spam-Tram Removal and Email De-duplication tools; to clean up, verify and sort your lists. We check MX records validity as well as carry out Bounce Processing.
What Is Your Accuracy Rate?
Our service is 97.5% accurate, providing the best in breed standard for measuring verifications and endorsed by thousands of satisfied customers.
Does it send out any e-mail message, while validating?
No, it doesn't. DeBounce employs DNS and SMTP protocol functionalities to perform email address validations and absolutely avoids sending any email message to external mail exchangers for delivery.

Service Usage

Which Package Should I Purchase?
It depends on the frequency in which you need to maintain email lists. Pay as You Go packages are best fit for different needs based on list size. Please note that DeBounce credits never expire.
How Fast Will You Process My Lists?
It depends on factors such as list size and quality. We use the best tools and practices in the industry to guarantee quick list processing.
Do Email Credits for "Pay as You Go" Packages Expire?
No, they do not. Your "Pay As You Go" email credits will be working as long as you haven't reached the limit.
How Can I Upload My Email Lists?
On the dashboard, you have the "Uploading Email Lists" option. Click on it and you will see how you can easily upload your files.
How do I sign up?
It is very easy, just click on the sign up button in the top right corner and give your name and e-mail address. You will soon receive a confirmation e-mail and you are good to go.
How do I login?
You can either use the login button in the top right corner or the link

How can I use my account?
We designed an easy to use interface for you. Furthermore you receive an easy built in Tour Guide to show you the main features. You can restart this short Tour Guide from Help at the left bottom of the page after login.
Can I get a refund?
Unfortunately No. Packages are not refundable.


How do I use the API?
There is a full documentation of API page which is accessible here.
What is maximum API call rate?
10 concurrent calls is the maximum you can perform while using the API endpoint.
What is the API's uptime?
We are always monitoring all validation servers including API. Currently, DeBounce API uptime guarantee is 99.8%. We never go below this. You can monitor all DeBounce servers and their up-times via this status page.
I get "No Access-Control-Allow-Origin" error on Javascript calls. What to do?
In order to access you website to connect to the API, you need to add your website domain to allowed CORS domains. To do so, open your API on dashboard, click on "Set CORS Domains" and add you website address to add permissions.
Does DeBounce store emails called from the API?
DeBounce really cares about data protection and user privacy and never store any emails called from API.
How do I know about remaining credits?
On every call, you will receive remaining credits on API response. Moreover, there is separate API to get remaining credits on your DeBounce account. See APIs here.

Request Support

To open a support ticket, please send an email to [email protected] and our stuff will respond to you shortly.

Typically, messages will be answered in less than 24hrs. we will reply back shortly.

If you have issues with your account. Please include your username, so our experts can solve your issue faster.