Impressionwise Email Verification and Spam Trap Removal


Threats API Overview

Our Hygiene API can be seamlessly integrated into your signup or onboarding process with just a single request. This high speed processing option is designed for continuous, real-time, data cleansing for cleansing an individual email address using standard HTTP methods.

Structure and Definition for Inbound Submissions

Our API requires you to authenticate each individual request. Below is an example of a basic URL structure request, just substitute with the provided account, associated password along with any optional parameters.


Required Data Fields

Parameters need to be separated by "&"

&CODE= 6 Digit numeric, acccount code provided by Impressionwise = 000001
&PWD= Alpha-numeric, security code provided by Impressionwise = password1
&EMAIL= Recipient email address to be submitted for processing =

Optional Client Pass-thru Fields

Parameter's need to be separate by "&" = param1=value1&param2=value2&...

&addr1=123 sw 150 ave

** Maximum of 20 "other" variables.

URL Structure Example

A properly formatted URL post would resemble the following example as shown below. sw 150 ave &addr2=&city=miami&state=FL&zip=33222&country=USA&phone=3057645678&gender=m&

Parameters and Usage

To verify an email address simply use the request shown in the sample below substituting the required parameters with provided credentials and email address you want to verify.

Sample =

Upon successful posting of an email address, you can expect to receive the following response.

Response =

Possible result parameter/values include:

&RESULT= "See below section Result Code section for additional detail"
&TTP= "Time it took to process value represented in seconds"
&NPD= "See below section Net Protect Detail section for additional detail"
&CC= "See below section Country Code Detail section for additional detail"

Error Handling

From time to time you may experience an API error. It is important to watch out for these and handle them appropriately. Specifically, if your submission contains an invalid account code or password the result response would be WRONG_PSW.

Additionally, it has been our experience that with some smaller email hosts it is not uncommon for their reply to take an excessive amount of time to respond (sometimes more than 10 seconds). Due to this possible condition, you will receive a result code of RETRY. Upon reception of this response, please continue your HTTP submissions thru to completion of the entire data set to be submitted.. Once complete, please retry any/all responses with "RETRY" or as shown below:

Response =

If you receive any other response other than those previously shown, please contact support.

Result Codes

The recommended guidelines presented below will ensure you are adhering to email best practices, enabling more emails to reach the inbox. As a result, you will mitigate any risk associated with emailing to potentially "bad" addresses and you will experience additional opens, higher click through rates, increased conversions, and more revenue while protecting your online reputation.

Current Version
Version 1.0

Result Specifications

Certified. All email addresses in this file have been certified good to send from a delivery reputation perspective, yet recipient-level bounce status has not been verified. With this understanding, you may upload this list to your ESP and send to each address with full confidence. Certified Send
Key. Protect against high-risk traffic sources. Our digital forensics analytics is designed to identify complex, non-human, machine-generated email accounts that historically use a variety of tactics to generate massive amounts of non-converting impressions. Key Send ONLY if Recipient was organically acquired with user- based submission evidence OR has purchase activity within last 90 days (open/click activity excluded)
Quarantine. Once active traps gone dormant may become reactivated during a 90 day period. Yet actively considered certified. Quarantine
Parked Site Intelligence. Avoid sending email traffic to millions of unused and parked domains. Since parked domains have previously not been configured for email or web service by the owner, any email sent to these domains is by definition, invalid and considered unsolicited or spam. All email received is often auto-forwarded to a central catch-all account to be black-holed or distributed to various blacklist providers. Parked Do Not Send
Seed. Third party oversight email address used for general monitoring of company's network resources. Removal of litigators and collaborative anti-spam activists historically known to purposely seed their email address(es) for the purpose of litigation. Seed
Proxies/ Bots. Protect against high-risk traffic sources. Our digital forensics analytics is designed to identify complex, non-human, machine-generated email accounts that historically use a variety of tactics to generate massive amounts of non-converting impressions. Bot
Invalid. Defined as the inability to actually deliver an email message to intended recipient's receiving domain per RFC standards. Invalid
Mole. Collaborating recipient submission-based or domain-level, anti-spam solution with no current, direct ownership of resources involved. Yet historical evidence firmly establishes a relationship to one or more DNSBL sites. Mole
Trap. Purpose-built, Spam-trap, or Honeypot e-mail address. Any e-mail messages sent to this address are immediately considered unsolicited. Trap

General Disclaimer: Every reasonable effort is made to locate all known threat and delivery classification elements mentioned herein, yet due to the constantly changing and dynamic nature of the online environment, we can not guarantee the results or deliverable will be free of any/all traps, threat or delivery classification elements identified within this report.

While every attempt has been made to ensure that the information in this document is accurate and complete, some typographical errors or technical inaccuracies may exist. Impressionwise does not accept responsibility for any kind of loss resulting from the use of information provided.

Questions? Please feel free to contact us with any questions or specific customization requirements you may have regarding our automated, data cleansing feed services to ensure a successful evaluation or use of our services and let the results speak for themselves!

The recognized authority in email verification
and list cleaning services

Impressionwise makes it easy for potential clients to evaluate our list cleaning services by offering a complimentary scan and report for a sample set of your data to illustrate the benefits of our services.

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