Jan Ingvoldstad writes:
On Sun, Nov 30, 2014 at 3:19 PM, Sam Varshavchik <<URL:mailto:mrsam@courier- mta.com>mr...@courier-mta.com> wrote:At some point, I suppose that the junk senders will wise up and will prudently set up their spam spewers, and at that point this check will lose its usefulness. But, until that happens, this is very useful. So that would be until around 2008, then? :)Spammers wisened up a long time ago, and are using a wide range of tricks to send their messages.
But not all of them. Like I said, right now this check stops a huge volume of crap.
I just checked my logs, and last week, the HELO check stopped over 500 spam delivery attempts.
I think that perhaps, but only perhaps, what is written in the HELO string can be used as an indication that all is not well, and therefore as one of many inputs into a spam evaluation program.But outright rejecting it? Well, I guarantee that this will catch a LOT of ham.
I don't recall ever seeing a false positive. But, of course, different organizations will have different kinds of mail traffic, so this check may not work for everyone. But it does work fairly well in many places, and it's just an option that nobody is required to use, but they can, if they want to, and if it stops a ton of spam for them, no reason not to use it.
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