viaQuote said:The real peril comes from third-party email hosting companies. These companies have arbitrary, non-public blacklisting rules. More importantly, they are not merely blacklist maintainers, they are MTA (and in some cases, even MUA) providers who sell their proprietary and/or trade-secret hosted solutions as a package to customers. Years ago, the idea of giving up that much control of what happens to your own email would be considered unbelievable. Today, it's commonplace.
And herein lies the fact that is obvious to most software freedom advocates but indiscernible by most email users. As a Free Software user, with your own MTA on your own machine, your software only functions if everyone else respects your right to run that software yourself. Furthermore, if the people you want to email are fully removed from their hosting service, they won't realize nor understand that their hosting site might block your emails. These companies have their customers fully manipulated to oppose your software freedom. In other words, you can't appeal to those customers (the people you want to email), because you're likely the only person to ever raise this issue with them (i.e., unless they know you very well, they'll assume you're crazy). You're left begging to the provider, whom you have no business relationship with, to convince them that their customers want to hear from you. Your voice rings out indecipherable from the spammers who want the same permission to attack their customers.
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Admittedly, this sounds like a standard Kafkaesque experience with a large company that almost everyone in post-modern society has experienced. However, it's different in one key way: I had to convince Microsoft to allow me to communicate with their customers who are paying Microsoft for proprietary and/or trade-secret software and services, ostensibly to improve efficiency of their communications. Plus, since Microsoft, by the nature of their so-called spam blocking, doesn't inform their customers whom they've blocked, I and my colleagues would have just sounded crazy if we'd asked our contacts to call their provider instead. (I actually considered this, and realized that we might negatively impact relationships with professional contacts.)
These problems do reduce email software freedom by network effects. Most people rely on third-party proprietary email software from Google, Microsoft, Barracuda, or others. Therefore, most people, don't exercise any software freedom regarding email services.
See also: https://vpsboard.com/topic/7465-email-spam-decreases-to-less-than-50-of-all-email/
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