What I cannot find here and maybe I missed it, what is the format of a decentralized email address?  The actual email of today slightly confuses those that do not have the history of it, but the first email addresses referred to "user at PC/server", in other words, in a network bob@station4.  The dot net's and com's referred to the type of server generally, then that turned into websites and ......

I'm just wondering how do you guys want to make a decentralized SMTP server what not going to be filtered out by most spam filters? Filters used to do reverse DNS checks and MX lookups for incoming emails and filter those what not coming from the "official" IP for a given domain. SPF checks are also getting more and more widespread. Could you tell me how are you planning to address these issues, please?