A misuse of Spamhaus blocklists: PART 2 - How to limit outbound spam
ID: 59382073-28fc-549c-9b59-d0a028725890
STIX ID: report--59382073-28fc-549c-9b59-d0a028725890
Feed Name: The Spamhaus Project
Guidance for ISPs operating mail services recommending measures to reduce spam and abuse: apply stricter policies or scoring for submissions from external IPs, monitor internal IP listings on spam/exploit blocklists (e.g., CSS, XBL) and investigate, use intelligence APIs, and restrict outbound port 25 to mail servers while relying on authenticated submission ports (587/465).
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