Has Plusnet started blocking SMTP traffic from known spam IPs?

[#1]

I run my own mail server and block a lot of spam by using zen.spamhaus.org. Up until about May 26 my mail logs showed about 300 spams per day being blocked. They are now down to about 6 or 7 per day. I'm curious to know if Plusnet are blocking the traffic, as I haven't heard of any spam operations being shut down recently. Of course, they may just be on vacation

[#2]

I think it would be a fair bet that the reduction in spam you've seen isn't coincidence. Processing the stuff is a major load on the mail routing and storage systems, Freeing those to deal with genuine messages should improve performance.

[#3]

Hmm, interesting if they have, since my mail goes nowhere near their mail systems. I don't have a problem with it, but there may be some who do. It would be nice to have a policy published somewhere it they are doing such traffic filtering.

[#4]

Hi @oldblokeh,

I've discussed this with a few colleagues and we don't believe this is anything to do with our side of things.