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What is the Certified Senders Alliance (CSA)?

Certified Senders Alliance is a European certification program establishing sender quality standards. Members agree to best practices for authentication, consent, complaint handling, and transparency. German ISPs particularly participate in **CSA** trust mechanisms.

Certification requirements include: proper SPF, DKIM, and DMARC configuration, documented consent practices, low complaint rates, responsive abuse handling, and compliance with German **data protection** requirements.

For senders with European audiences, especially German recipients, **CSA** certification can improve delivery to participating providers. The program's stringent requirements mean certification signals genuine commitment to best practices.