On Mon, 2012-09-17 at 10:52 -0400, Kris Deugau wrote:
> I see more spam[1] from any one of Hotmail, Yahoo, or GMail than I do > coming through the whole set of email service providers I've IDed > (both email-hosting and bulkmailers) of all stripes. > > As an ISP mail admin, I **CANNOT** afford to block legitimate mail > from any source, and if I see a report that a legitimate mail was > blocked by any local rules or DNSBL data, I change the local rule or > delete the offending local DNSBL entry ASAP. > As an ISP Email admin I applied the same rules evenly, to end users and hosting. in early 2000's, hrmm, or was it late 90's, we outright blocked AOL for some 4 months at one point, but, not being in the U.S. that was an easy ride, even though AOL did have a lot of dialups out here then. I block also on idiots who cannot get their DNS sorted as well, that catches a lot more flak from senders than any other form of blocking, but none of them are yet to give me a good enough reason to make my system accept non compliant connections, when the majority of them are in general spam or malware, I had a greater than 90% reduction in spam and anti-virus checking when I enforced that over ten years ago and have stuck with it since. I do however understand that some mail admins dont have enough pull with management and may be forced to keep letting these vermin in. As for DNS, the incompetency still exists today, but I think in relation to invalid DNS, its far more sys admin lazyness than anything else.
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