For all serious uses, I employ Gmail.
Without Gmail, Microsoft and Yahoo would be but pale shadows of their current inadequate selves.
Of course, if you need Snowden-level security, you should not be using any internet service. You should be using only your own stack, end-to-end encrypted. It's OK, even desirable, to use service providers. But the payloads must be utterly opaque!
“Of course, if you need Snowden-level security, you should not be using any internet service.”
That’s what the founder of lava-bit, the e/m provider for Snowden said after the feds leaned on him to either fork over the keys or shut down,,and shut down he did. He stated that knowing what he knows, never use the “normal” e-mail.