I'm trying to provide a way for myself to reach people who contact me through what is essentially a website form.
The problem with e-mail, the obvious contender, is that it's inherently insecure and privacyless -- both for the sender and the receiver (especially if they are to reply). Even if there may exist some kind of service out there which allows you to pay with Bitcoin and doesn't require an e-mail address to register an account and which promises to not track you, the problem is beyond their powers anyway since the e-mail messages still have to reach the inboxes, which they won't unless you jump through 48 different burning hoops, backwards.
So, long story short: e-mail is out of the question.
But then there's nothing left except these obscure projects such as Bitmessage which nobody has heard of, and which are impossible to make people use (trust me: I've tried!)...
Obviously, Twitter/Facebook/etc. are automatically disqualified since they are not P2P/decentralized whatsoever, and even less private than e-mail.
I wish there were some kind of system which doesn't even require special software to be installed, which uses some sort of existing technology to send JSON blobs around or something. Which is reliable, accountless, decentralized and encrypted.
Or at least depends on some really trustworthy software which is minimal and user-friendly and polished and nice. Not something which pulls down 525 random dependencies and takes a computer hacker to get started with.
You'd think they would have come up with something like that by now!
PS: There would be no requirement for this system to be able to send attachments of any kind. Small text messages are quite sufficient.