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High Speed Verifier

High-speed software designed to check e-mail address for existence.

High Speed Verifier (HSV) is capable of checking thousands of addresses per second. It can easily deal with mailing lists containing tens millions of addresses; moreover, it is with this list size that the program's highest performance can be achieved.

High Speed Verifier detects about 20-30% of invalid addresses in a mailing list, though theoretically it is possible to detect up to 60-70% using a software product. This figure seems relatively small, but actually, it might make 10% of a list. Besides, HSV provides for optimal checking mode in terms of time and data traffic. More thorough checking (with which the rest 40% of invalid addresses could be detected) takes 10 times longer and requires 5 times greater traffic for each address, hence it's not that advisable with huge lists.

High Speed Verifier is offered as a solution for quick removal of garbage from lists with millions of addresses checking by DNS existence of mail servers. Growth of the HSV operating rate with longer lists is ensured by the fact that HSV stores the results of all queries to DNS servers in RAM cache, so, with longer lists the rate of cache hits is greater.

High Speed Verifier is the first professional software designed to check huge mailing lists, it is created by professionals for professionals. We hope with HSV your business will be more effective and successful, and you will enjoy using our product.

System requirements

  • PC with MS Windows from Vista to Windows 10 installed
  • At least Internet Explorer 8 installed
  • 14 MB free space on hard disk
  • 1 GB RAM or more
  • Internet broadband connection (ADSL/LAN/WiFi)



High Speed Verifier is shareware. To use this software without limitations, a registration is required. You can order the fully licensed version over the Internet with any major credit card.

Maintenance License allow to receive free updates and technical support during the term of the license
Subscription License allow to receive configuration updates and any version upgrade for free during the term of the license.
Lifetime License allow to receive configuration updates and minor version upgrade for free during the term of the license. This type of license not allowed for major version upgrades of the program

If you've made a payment, but haven't got a confirmation letter with your serial number (registration code) within a reasonable amount of time (two business days for credit card payments or two weeks for other payments), please notify us about that via Automated HelpDesk. We're very sorry for any inconvenience caused by those delays.

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