==== Required information ====
- iRedMail version: 0.8.3
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Linux/BSD distribution name and version: Ubuntu 12.04
- Related log if you're reporting an issue:

Oct 22 12:00:39 mail postfix/smtpd[4765]: connect from mail-ia0-f181.google.com[209.85.210.181]
Oct 22 12:00:41 mail cbpolicyd[3139]: module=Greylisting, action=defer, host=209.85.210.181, helo=mail-ia0-f181.google.com, from=xxxxxxxx@gmail.com, to=info@xxxxx-xxxxxx$
Oct 22 12:00:41 mail postfix/smtpd[4765]: NOQUEUE: reject: RCPT from mail-ia0-f181.google.com[209.85.210.181]: 451 4.7.1 <info@xxxxxx.xxxxxx.com>: Recipient address rejected: $
Oct 22 12:00:41 mail postfix/smtpd[4765]: disconnect from mail-ia0-f181.google.com[209.85.210.181]

====

I have one primary domain where iredmail is installed on and one virtual.

Sending and receiving via primary domain (everything working)
Sending via virtual domain (working)
Receiving via virtual domain (not working)

I am not a pro but as per the log it seems it being rejected. The address is that of a gmail. What could be the issue.

Thanks for the amazing support I have received so far.