How to stop spam emails

Spam emails can be reduced through a combination of email filtering, authentication protocols, and user best practices.

How to stop spam emails

Spam — unsolicited bulk email — can be reduced through technical measures and user behavior. Effective spam prevention uses a multi-layered approach combining automated filtering, authentication, and awareness.

Email authentication protocols

  • SPF (Sender Policy Framework): Specifies which mail servers are authorized to send email for a domain
  • DKIM (DomainKeys Identified Mail): Adds a digital signature to verify the sender
  • DMARC: Combines SPF and DKIM to provide instructions for handling unauthenticated email

Best practices

Use strong spam filters, never respond to spam, avoid publishing email addresses publicly, use email aliases, report spam to help train filters, and implement email authentication for your domain.