I have thought long and hard about IPv6 spam. Fortunately I have only had a couple of messages - so far...
Within postscreen, I have whitelisted all my regular ipv6 correspondents, and am using bl.ipv6.spameatingmonkey.net, and the cymru.com bogon lists in the rbls Within smtpd, I use all the RHS blacklists I can find against host and HELO names - in addition to all the unknown- and invalid- rejects. I would be interested to know the measures other people use. Allen C On 08/09/16 15:24, /dev/rob0 wrote: > On Thu, Sep 08, 2016 at 02:18:41PM +0100, Danny Horne wrote: >> Thanks for the reply, I found the following site which showed me I >> was seriously lacking in my IPv6 config. I think I've got it fixed >> now (email from GMail came through on an IPv6 address) >> >> http://www.postfix.org/IPV6_README.html > Good, glad to hear it. > > The following is WRONG and BAD advice from multiple perspectives, but > it's my own little opinion and I am sticking with it. :) > > I am not in any hurry to move my email into IPv6 land. For now I am > satisfied to have IPv4-only MX records for my domains. My server is > IPv4-only, for that matter. > > Why? Well, in IPv4 the spam problem, while not solved, is well under > control. But when spammers move into IPv6, and they *will* when it > is in more widespread use, spam is going to be a huge mess. The > tools which work so well in IPv4, namely DNSBL services, won't cope > with IPv6. > > I think the only thing which will work for IPv6 would be a new > paradigm of default-deny and whitelisting, rather than the IPv4 way > of default-allow and blacklisting. > > Yes, I do acknowledge the necessity to move toward IPv6, but it's a > long way off before there are any significant IPv6-only email sites. > Right now if you're unable to do mail on IPv4, you're going to be cut > off from large parts of the Internet. > > I don't want to be a pioneer before then. :)