On Thu, August 27, 2015 9:29 am, m.r...@5-cent.us wrote: > Gary Stainburn wrote: >> Bad news Guys, they've just moved the emails to somewhere else and have started again: > <snip> > > A suggestion: there should be a way to filter using *domain* AND mailhost; > that is, if emails come from a domain, and through one mailhost, then block the domain. If many domains, and the same mailhost, only then block > the mailhost.
Me too: I started receiving them from different IP (with much longer delay, so they do add "improvements" to their setup). This IP, has neither DNS A record nor DNS PTR record, but has DNS MX record. One can use these (have your MX stop talking to anything having broken DNS records). I however am tempted to block digitalocean's whole blocks of IP addresses again (after all, I bet I've seen the whole collection of these images already ;-). This is not trouble with their customer IMHO. This is trouble with themselves: how come the IP that is not registered in DNS can have DNS MX record, and can be accessed by somebody?! > > I've been thinking about this since yesterday, when I got back from vacation, to hear from my manager that he had to screw with mailman, because we were getting a lot of emails from elsewhere, subscribing to one > or more of our lists... and having the target be one of three gmail accounts - a DDoS against them (and we assume that they're doing it to a lot of other places). That is another side of you being famous ;-) We are not, so no one is trying to abuse somebody else by means of subscribing them to our mail lists (that said, it would be our list admins who would be abused as all lists - based on mailman - require approval and confirmation, the last comes after approval if I remember correctly). Thanks. Valeri > > Anyway, given the number of times I've been blocked by nixspam (which I found is run by IX, a German IT mag, and that they don't answer emails to > *them*, either), I've been trying to think of a *reasonable* way to block > that doesn't do collective punishment to the many domains of a huge hosting provider, and that's my best thought so far. > > mark > > _______________________________________________ > CentOS mailing list > CentOS@centos.org > https://lists.centos.org/mailman/listinfo/centos > ++++++++++++++++++++++++++++++++++++++++ Valeri Galtsev Sr System Administrator Department of Astronomy and Astrophysics Kavli Institute for Cosmological Physics University of Chicago Phone: 773-702-4247 ++++++++++++++++++++++++++++++++++++++++ _______________________________________________ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
