xmail

xmail is a Go tool that uses haccer/available to detect which email addresses have domains which are able to be registered.

Install:

go install github.com/haccer/xmail@latest

or

git clone https://github.com/haccer/xmail
cd xmail
go install

Usage:

cat emails.txt | xmail

or

xmail -w emails.txt

With JSON:

% cat emails.txt| xmail --json
[
  {
    "domain": "doalkdjfaklsjdfk.com"
  },
  {
    "domain": "doesntexisthahshhsh.com"
  }
]