If you use shared hosing Rochard. Otherwise, you need to operate a mailserver (SMTP/IMAP (POP)).
You can move the MX DNS for your mail server for that domain to a central server that you; either operate yourself, or to a mail server you designate in a TXT spf="" entry.
He wants to use a email server, with his domain name.
**^^ Yandex LOL I am not sending my emails to Russia
