Andy Bradford wrote:
The most common unauthorized use of someone's domain is spam. Are you saying that the designers of these SMTP hacks had something else in mind? Maybe they were trying to keep Microsoft from influencing IBM's employees by sending fake emails that appear to come from IBM? This would be fraud and a criminal offence; SPF and DomainKeys are not necessary to persuade them from doing that. So what other kinds of people would benefit from using a real domain that belongs to someone else?
I guess I didn't state that clearly. SPF and DK do not by themselves solve the spam problem. Their intent was to deal with a certain portion of the spam problem -- email that claimed to be from someone it wasn't from. Thus they are more of a domain authentication measure than anything else.
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