Mail relays - Part 1 | Authenticate your outgoing mail!
ID: 974d2a77-4c84-54e1-8aec-9958d21ad974
STIX ID: report--974d2a77-4c84-54e1-8aec-9958d21ad974
Feed Name: The Spamhaus Project
**Executive summary:** Guidance for mail relays to improve email authentication and reduce abuse by enforcing SPF/DKIM/DMARC, ensuring outgoing messages use the client's domain or a dedicated subdomain (placing visitor addresses in the body or Reply-To instead of the From header), and applying per-client rate limits to detect and prevent suspicious sending behavior.
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