The Spamhaus ProjectIs Port 25 on your network restricted? If not, why not? We are seeing an increasing number of issues arising from ISPs leaving Port 25 open, and we would like to understand why this is happening?
Want to know more about why you should restrict port 25?
👉 See our FAQs: https://spamhaus.org/faqs/policy-blocklist-pbl/#why-is-port-25-for-email-transmission-no-longer-widely-supported
👉 Read the
@M3AAWG
's best practice on how to manage Port 25: https://m3aawg.org/sites/default/files/managing_port_25_2023.pdf
Want to discuss this further? If you're at #M3AAWG this week, connect with one of the Spamhaus team, or please reach out to use via this social channel.
