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Compliance2026/11/04

Email addresses in Spain: consent rules and verification workflow

Technical verification steps and legal framework overview (GDPR and Spain's LSSI-CE) when managing Spanish email lists.

Note: This article provides general operational and technical information as of 2026-11-04 and is not legal advice. Consult qualified Spanish legal counsel regarding your specific data processing and marketing activities.

Managing subscriber and B2B lists in Spain requires two separate layers of discipline: complying with European and Spanish electronic communications rules, and running technical email verification across .es and global domains before sending.

Commercial email directed to recipients in Spain is governed both by the EU General Data Protection Regulation (GDPR, Regulation (EU) 2016/679) and by Spain's Law 34/2002 on Information Society Services and Electronic Commerce (LSSI-CE). Article 21 of the LSSI-CE generally prohibits sending commercial communications by email that have not been previously requested or expressly authorized by the recipient, with a narrow exception for prior contractual relationships involving similar products or services of the sender's own company, provided the recipient is offered a simple, free opt-out at collection and in every message.

Technical verification workflow for Spanish lists

Technical verification does not establish consent, and consent does not guarantee a working mailbox. Run both checks before importing or mailing a Spanish list:

  1. Syntax and domain check: catch common typos in local domains (.es, .com.es, .org.es) and confirm the domain publishes valid MX records.
  2. Disposable and role detection: flag temporary addresses and generic corporate prefixes (info@, administracion@, contacto@, ventas@) that are shared across a department rather than tied to an individual who gave consent.
  3. SMTP and catch-all handling: verify individual mailboxes over SMTP and isolate catchall corporate domains so unverified guesses do not generate hard bounces.

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