🤔 ISPs | Still have doubts about blocking port 25 outbound? We’re not the only ones who recommend this....

In 2005, the Messaging, Malware, and Mobile Anti-Abuse Working Group published best practice guidance on managing Port 25, which was most recently updated last year.

Read M3AAWG’s best practice here 👇
https://www.m3aawg.org/sites/default/files/managing_port_25_2023.pdf

Want to discuss this further? Connect with one of the Spamhaus team, or please reach out to us via this social channel.

#RestrictPort25 #BestPractice

🚨 Blocking port 25 outbound can sound alarming - causing worries about operational disruptions or frustrated users. But don’t worry! There are more secure alternatives for sending authenticated, encrypted emails - consider using port 465 or 587 instead.

👉 Learn more here: https://www.spamhaus.org/restrict-port-25/

Want to discuss this further? Connect with one of the Spamhaus team, or please reach out to us via this social channel.

#RestrictPort25 #SecureEmail #Port465 #Port587 

❗️Spamhaus #TicketDeskTeam continues to receive a flood of removal requests from frustrated mobile phone users who can't send emails from their devices, due to their ISPs policies. Can you guess what the ISP's in question are still doing?

Find out here ⬇️
https://www.spamhaus.org/resource-hub/compromised/spammers-love-mobile-phone-ip-space-heres-how-to-fix-that/

#RestrictPort25 #proxies #malware

"These days with CGNAT, the spammer doesn't just have one IP at a time, he has the whole pool to spam from, funnelled through a single IP that is shared with a lot of innocent victims of their ISP's policy." 

👉 Internet service providers - learn more about the problems with Carrier-Grade Network Address Translation (CGNAT) and what you can do to protect users:

https://www.spamhaus.org/resource-hub/network-security/the-conundrum-that-is-the-modern-use-of-nat-at-a-carrier-grade-level/

#RestrictPort25 #CGNAT #NetworkSecurity

For several years, Spamhaus researchers have been observing the negative impact of downloading free apps and toolbars that turn residential networks into a proxy for paying users:

https://www.spamhaus.org/resource-hub/compromised/lets-talk-about-the-danger-of-residential-proxy-networks/

For Internet Service Providers, restricting port 25 is an essential step to protect your network from malware spread by proxies.

👉 You can learn more about this escalating issue and how to resolve it here: https://www.spamhaus.org/restrict-port-25/

If you’d like to discuss this further, connect with one of the Spamhaus team, or reach out to us via this social channel.

#RestrictPort25 #Proxies