Under GDPR, individuals have the right to request the deletion of their personal data. Experts and marketers recommend a nuanced approach regarding competitor emails on suppression lists. Complying with erasure requests is crucial, but a 'legitimate interest' might allow retaining minimal suppression records (email and request date) to prevent future contact, used *only* for that purpose. Domain-level blocking offers a privacy-friendly alternative. Legal counsel is strongly advised to navigate the complexities. Data retention should be transparent, and consider anonymizing data or if there is no business relationship delete it. Maintain a clean list, and treat erasure with the same urgency as removing bounces/complaints.