DKIM adds a digital signature to outgoing emails so receiving mail servers can verify they were sent from an authorized source and haven’t been altered in transit.
Why it matters:
- Confirms the authenticity and integrity of your email.
- Helps prevent tampering and phishing.
- Required by most major email providers for reliable delivery.
Pro tip: Think of DKIM as a “signature seal” on every email — if it’s missing or broken, mail may go to spam.
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