On Mon, Jul 6, 2015 at 5:34 PM, <[email protected]> wrote:
> 7. Jul 2015 00:22 by [email protected]: > > -all only means something if it's by itself, ie as used to say a domain > never sends email. > > > The SPF crowd would claim otherwise, that -all means reject the message > with or without other stuff, but I agree that in practice you can't do that > other than for plain -all meaning we send no mail. > > > If bigger carriers like Google or Yahoo suddenly started sending perm/temp > errors where appropriate for validation errors (too many DNS lookups, > malformed record, etc), -all, and others it might kick enough people in the > rear that the practice then becomes OK. Or so I would hope. :) > > When you do such things, you have t figure out how many "legitimate" messages you will be blocking. You will then have to figure out, which helpdesk is going to explode, the sender one, or the receiver one? Considering many people don't look at their logs nor understand bounce messages (they are ghastly). There is very very little incentive for a receiver to enforce to the letter the RFCs.
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