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Email Validation For Improved Delivery

Data quality and delivery rates are a big piece of sender reputation and inbox placement. TowerData's Email Validation has been the industry standard in email list cleaning since 2002.

Brochure Documentation

TowerData’s Email Validation service identifies invalid, fraudulent, and risky email addresses on your subscriber list without sending an email.

Feature Rich

The feature rich service includes a syntax check, a domain check, correction of syntax and spelling errors, suppression of toxic usernames and domains, a bot check, spam-trap check, group account flag, and finally a mailbox check to confirm the address exists and is active.


Globally Functional

Our proprietary technology is globally functional and can identify up to 99% of undeliverable email addresses on your file.  Available as a batch service for static databases or via API for your webforms, TowerData is known for our accurate results and granular reporting.


  1. Mailbox Check

  2. Domain Check

  3. Syntax Check

  4. Toxic Data Suppression

  5. Bot Check

  6. Correction Algorithms

  7. Batch or Real-Time Availability

  1. Webforms – registration

  2. Batch processing against old, neglected data

  1. Do the service scrub spam traps?

    Yes and no. TowerData maintains a 2,000,000 record file of toxic data comprised of suspected spam-traps and habitual complainers. This can flag potentially problematic data, but by nature spam traps are secretive and constantly changing. There’s no silver bullet fix to spam traps, the best approach is upstream with sound list building practices.

  2. Do you offer a free-trial?

    Yes we do, contact us to take advantage of that.

  3. Does the service send an email to my list?

    No. We use proprietary technology up to and including a mailbox ping, but stop short of sending an email.

  4. Do you guarantee 100% delivery rate after validation?

    Email Validation is nuanced. We are communicating with potentially thousands of domains on a given list. The service is dependent on the receiving domain being receptive to and responding to our request within a timely manner. Net result, for B2C data we can typically find 95-99% of the invalids. For B2B data, where recipient domains are more likely to managed by a system administrator, the service is less effective.

  5. How will it take to process my list?

    Generally speaking most lists are completed with in a business day. For files of over 1 million several days will be required.

TowerData Locations

New York, NY

379 Park Ave South
5th Floor
New York, NY 10016
1-646-742-1771 Phone
1-646-365-3060 Fax

Rochester, NY

6 North Main Street
Suite 230
Fairport, NY 14450

Chicago, IL

222 W Merchandise Mart Plaza #1225
Chicago, IL 60654

Connect with us online:

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