About ListGuard

ListGuard is an email-list cleaning tool for anyone who sends email at scale: marketers, entrepreneurs, e-commerce and agencies. It removes dead, duplicate, disposable and role addresses from your list, checks domain health, and gives you a clean list plus a plain report of what was removed and why.

Who builds it

ListGuard is built and operated by Eric Dieperink, founder of Diexar, the company behind ListGuard. Eric builds the product, runs the infrastructure and handles support directly.

How it is run

Core cleaning runs on European infrastructure by default. Your uploaded list is not stored after cleaning; the full data-handling description, including the documented exceptions such as saved suppression lists and optional external mailbox verification, is on the security page and in the privacy policy.

Contact

Questions or feedback? Email eric@diexar.nl or use the contact page.