GDPR Email Signature Compliance

Under the EU General Data Protection Regulation (GDPR), businesses sending email to EU residents typically include identifying information about the sender's legal entity in the email signature: company name, registered address, company registration number (where applicable), and contact information for data protection inquiries. While the GDPR itself does not mandate a specific email signature format, several aligned regulations and member state laws require email transparency. For example, Germany's Telemediengesetz (TMG) and the EU's Distance Selling Directive require commercial email to disclose the sender's legal entity. Email signature management platforms that serve EU customers typically support GDPR-aligned signatures by embedding the entity information consistently across every employee's signature, providing a 'data protection contact' link where appropriate, and supporting per-region template variants so that signatures sent to EU recipients carry GDPR-aligned content while signatures to other regions can omit it. The vendor itself must also be GDPR-compliant in how it processes the employee directory data, typically requiring a signed Data Processing Agreement (DPA) and documented sub-processor list.