Marc wrote: > Sometime flawed technologies still have uses. SPF breaks email > forwarding. But using that flaw I may be able to detect forwarding > sources through SPF failures. The idea being that if it's legitimate > email but SPF is wrong then the message was likely forwarded from a > legitimate source.
True that even if a technology isn't perfect it can still have its uses, however... If you are going to use SPF to try and figure out who is potentially forwarding email via failed SPF, how would you differentiate between a legit forward and a faked spam message? You'd have to implement a list; in the end, you'd end up implementing SPF as it was intended (while avoiding its flaws), yet you would likely not want its results because you consider it useless for its actual intended purpose? Eli. -- ## List details at http://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
