LinuxQuestions.org - [SOLVED] Recipient address rejected: User unknown in virtual alias table

Hi all,

I have an email server on Ubuntu 14.04 with Postfix, Dovecot, MySQL from this link https://www.exratione.com/2014/05/a-...dovecot-mysql/. It was working fine till yesterday. But today it starts creating problem. It has stopped receiving emails. The sender is getting the bounced email with following error:

Code:

Technical details of permanent failure:

Google tried to deliver your message, but it was rejected by the server for the recipient domain mydomain.com by us2.mx2.mailhostbox.com. [208.91.199.202].



The error that the other server returned was:

550-5.1.1 <hemsingh@mydomain.com>: Recipient address rejected: User unknown in virtual alias table.

I have not found anything about this in mail.log. I have tried things from google in /etc/postfix/main.cf
---

Code:

myhostname = mail.mydomain.com

#

myorigin = /etc/hostname

#myorigin = $myhostname

#

#mydestination = mail.mydomain.com, localhost, localhost.localdomain

#mydestination = $myhostname, localhost.$mydomain, localhost,$mydomain

#mydestination = localhost, localhost.localdomain

mydestination =

---
tried all these but nothing is working. Earlier "mydestination =" was working fine. Big trouble for me.

Can anyone suggest me where can be the problem. I am running two domains on this server. I had setup this server from ssh on fresh Ubuntu.

Thanks & Regards,
Hem Singh