Need an email validation service. Are there such in runet?

Question

Email

I welcome everyone.
We need an email verification service similar in functionality to mailboxlayer.com: MX and SMTP checks, Free and Disposable flags, etc.
I want it cheaper, I want it from “ours”, I want to pay with a Mir card.
Suggest options, please.

Answer 1

What does "validity" mean? Compliance with the [email protected] format or what? Or "presence of existence"?
If the latter, then you can exhale - the presence of a mailbox does not guarantee that mail will actually get into it, the "absence" of a mailbox (diagnostics of the user not found type) does not mean at all that it is actually not found.
Within my mail server, I can run this diagnostic however I want. I don’t want to accept a letter from you - well, here user not found, maybe you can get rid of it ...