Sources for learning how to work with email?

Question

Email

I just don’t even know how to google, because the search engines give out all sorts of nonsense. I would like to find maybe some books by e-mail. I came across a maximum of all sorts of MIME, protocols for e-mail, but no more.

Answer 1

Google: "postfix. detailed manual pdf"
The first link is yours, in Russian. It's all there from the bottom. Build a foundation, understand the principles of SMTP and any mailer is yours.

Answer 2

What do you need? The work of mail is based on postal standards, so start with them.