No.14
I've always wondered, could you just use the mail server's IP as the domain? peepeepoopoo@1.3.3.7?
No.16
while you should still already do some of the shit alphabet forces for other hosts that doesnt mean all of it (spam protection that isnt bullshit mostly)
since you only wanted to receive you could setup accounts on other providers that are accepted by the mafia that dont cuck imap/pop then use something to pull into your own imapd/popd store while deleting it from those hosts
that doesnt mean if its unencrypted its safe in this case or that its really deleted off their servers never assume that so were back to square one
if $freedomain or even $freesubdomain isnt tracked by a bl yet and isnt extremely cucked with what records you can push thats good freesubdomains are usually a good target there
but then we have "surveillance companies" surely you mean your isp right where is the encryption in that chain
but use tor no the exit will track it unless your fine with that
unless you can get "employers/banks/governments/etc" to adopt pgp/smime/etc or something less cancerous it isnt looking that nice
thought if you didnt care about the isp or an theoretical exits/entrances some modern form of mixion allows sending and receiving into the botnet thought that might be gone
forget those companies probably bought data over dragnet surveillance