I need ONE mailbox to received at my domain for SSL domain validation, how ?
I'm newby, and want to use SSL for my domain, that processing need email with my domain for domain validation (postmaster, webmaster or hostmaster). I can send email from firstname.lastname@example.org, but could not received from other email (gmail). I have install postfix, dovecot, and tried to install Ajenti, floxlor, vestaCP, zpanel, postfixadmin, etc... (I read several articles from this community). success installation (?) but still could not received email from others.. very-very frustated... at last I tried instructions at this article : https://www.exratione.com/2012/05/a-mailserver-on-ubuntu-1204-postfix-dovecot-mysql/ but still failed (I check at /var/log/mail.log but don't understand that) This is email bouncing after I sent from gmail to mydomain : Technical details of permanent failure: Google tried to deliver your message, but it was rejected by the server for the recipient domain euliasoft.com by euliasoft.com. [18.104.22.168]. The error that the other server returned was: 550 5.1.1 : Recipient address rejected: User unknown in virtual mailbox table .... I only need ONE mailbox just for received from SSL provider to domain validation. May anyone can help to setup received email easily (forwarding email is enough), thanks before