[nollidge]

I think you mean "You can't afford to stop using mail"?

[shawabawa3]

I think he means "You can't afford to stop using email"

I'm from the UK and I've never heard anybody say mail when they meant email.

[nollidge]

It was a typo before, used to say "use" instead of "using".

[charonn0]

I'm from the US and have never heard that either.

[premyslruzicka]

Thanks.