Woah, those are *really* small numbers! I've got one - with a brand-new, unpublished domain - which usually sees 1200-2400 Postscreen-initiated every 24 hours. Uhh actually I just checked, and last night the number was 13,811 dropped by Postscreen, 20 dropped with 4xx Rejects, and 1 dropped with a 5xx Reject... for a whopping total of 11 delivered messages. I also see plenty of HTTP requests for things like /shell?cat%20/etc/passwd :eyeroll: What sort of firewalling are you doing around your mail server? E -------------------------------------------- Q: Why is this email five sentences or less? A: http://five.sentenc.es On Wed, 11 Oct 2017, at 12:48, Lawrence D'Oliveiro wrote:
On Thu, 5 Oct 2017 12:41:52 +1300, I wrote:
I am currently messing about with a virtual private server at Rimu Hosting, with a view to have it take over my e-mail serving after Vodafone turns off its provision of that service.
I have it working, to the point where I have set the highest-priority MX record pointing to my server (with Vodafone still there as a backup).
On the down side, I am now seeing all the spam that Vodafone was previously filtering out for me. On the bright side, most of it has some fairly simple characteristics that I can use to configure Postfix to simply refuse to accept delivery:
* particular forms of e-mail address that I have never used online, or last used decades ago * connection attempts from IP addresses that have no names in the reverse DNS * malformed HELO handshakes
Here are some stats from my system log on rejections based on the above criteria, since about 4pm October 3rd:
“Recipient address rejected” -- 211 “Helo command rejected” -- 187
Currently about a dozen pieces of spam per day are making it past these checks. So about 75% is not even being delivered to me. I think I can live with that--if it doesn’t get any worse. ;)
Also there are some attempts to see if I’m running an open relay:
“Relay access denied” -- 40 _______________________________________________ wlug mailing list | wlug(a)list.waikato.ac.nz Unsubscribe: https://list.waikato.ac.nz/mailman/listinfo/wlug