I meant rather with the aim of progressively replacing smtp. We complain about these protocols that are too widespread to ever be retired but the reality is th

I meant rather with the aim of progressively replacing smtp. We complain about these protocols that are too widespread to ever be retired but the reality is that TLS and http are managing the pace, ftp, pop and imap are almost gone, and smtp is probably the last of the 1990s protocols that is frozen in time while being a backbone of communications (and attack vectors) on the internet.