Email is a way to communicate.
See:
My email client of choice is mac OS' default Mail.app application. Of course I use a client. Feel free to leave me a message: bouncepaw2 at at at ya.ru. I have other addresses. Use them, if you know them. All of them are temporary.
I do not like email, I would've chosen a different technology for communication of this sort, if there was a worthy alternative. The biggest problem is text. Email hasn't solved text yet. There are two camps. One camp sends HTML-formatted messages, the other camp sends hard wrapped plain-text messages, which might be even worse.
Also, for some reason, for normies, emails is no more than a rubbish bin that collects service messages for registration and receipts. I despise that.