The esteemed Barry Warsaw has said: > > Which ISP do you use? I have a static IP from my cable company but > they refuse to give me an rDNS entry. In every other way, I really > like them, but I do get bounces occasionally from people's (IMHO) > misconfigured MTAs who don't accept mail from cable rDNSs. > > - -Barry > Barry, I'm going to disagree with you on this one. Virtually all of the spam that gets through the various filters on my box comes from big-service dynamic IP's right here in the US.
Right now, I'm trying to home in on some of this spam, and am operating under the assumption that I've got two or three users with infected Microsoft systems sending out port 25 mail without their knowledge. I've pinned down a couple of others. These users haven't got the foggiest notion that there is anything wrong, what is wrong, why it is wrong, or what to do about it, and that seems to be a common affliction among consumer users with "always-on" internet connectivity. My own site has two IP's, with their own identities separate from my upstream feed, with reverse lookups properly configured, and no port blocking either way. It took some time, discussion, and a couple of very serious technical interviews with their people before they agreed to that. They consider me a "commercial" site "with competent on-site administration," and terms and conditions which are quite different from consumer sites. I'd really call a sendmail receiving site that blocks dynamic IP mail as "misconfigured," when virtually all of the mail coming from such IP's is spam. Hank ------------------------------------------------------ Mailman-Users mailing list Mailman-Users@python.org http://mail.python.org/mailman/listinfo/mailman-users Mailman FAQ: http://www.python.org/cgi-bin/faqw-mm.py Searchable Archives: http://www.mail-archive.com/mailman-users%40python.org/ Unsubscribe: http://mail.python.org/mailman/options/mailman-users/archive%40jab.org Security Policy: http://www.python.org/cgi-bin/faqw-mm.py?req=show&file=faq01.027.htp
