I don't personally think it sucks. There are bike-shed levels of improvements that probably any person on HN could dream up to make it more effective and work more reliably.

The only purpose it has for me for last decade is bills, invoices and all sort of similar transactional spam crap.

Precisely. All actual communication (family, friends, etc) has moved to text, facebook messenger, etc, in large part because of how crappy email is/has gotten.

> large part because of how crappy email is/has gotten

The funny bit here is that email itself hasn't actually changed at all (at least not in ways that affect personal communication). It's just that folks have become used to the intrusive instant gratification of push-based chat systems.

Well, for a start, there is no way of knowing if a message I sent actually get delivered.

Messages sometimes take minutes or even go up a to come through for no apparent reason what so ever.

Massive spam issues. Headers are trivially forged

People can sign up other peoples addresses to mailing lists, and if that 3rd party is a company, good luck not getting re-subscribed to random stuff for the rest of eternity.

> Well, for a start, there is no way of knowing if a message I sent actually get delivered.

That's a feature. I don't want senders to know if their message was received without my explicit acknowledgement.

> Well, for a start, there is no way of knowing if a message I sent actually get delivered.

There is, but nobody uses it.

> Massive spam issues.

Verify your recipients, then add them to a white list, then block everybody else, like a typical chat program does.

> Well, for a start, there is no way of knowing if a message I sent actually get delivered.

Every major email client has supported read receipts for a very long time now. It's just rarely enabled by default outside of corporate environments (I would guess in part because users find it invasive).