Able to send email's but not to receive in inbox

Hello,
I am using CyberPanel V 2.1 on CentOS 7; I have also the same problem as I am able to send email’s but can’t received in my inbox.
When I run this command: journalctl -f | grep postfix

[root@server ~]# journalctl -f | grep postfix
Sep 01 10:43:00 example.com postfix/smtpd[541590]: connect from mail-oi1-f175.google.com[209.85.167.175]
Sep 01 10:43:00 example.com postfix/smtpd[541590]: warning: smtpd_client_event_limit_exceptions: non-null host address bits in “xx.xx.xx.xx/24”, perhaps you should use “xx.xx.xx.0/24” instead
Sep 01 10:43:00 example.com postfix/smtpd[541590]: warning: mynetworks: non-null host address bits in “xx.xx.xx.xx/24”, perhaps you should use “xx.xx.xx.0/24” instead
Sep 01 10:43:00 example.com postfix/smtpd[541590]: NOQUEUE: reject: RCPT from mail-oi1-f175.google.com[209.85.167.175]: 451 4.3.0 info@mydomain.com: Temporary lookup failure; from=myusername@gmail.com to=info@mydomain.com proto=ESMTP helo=<mail-oi1-f175.google.com>
Sep 01 10:43:00 example.com postfix/smtpd[541590]: warning: smtpd_client_event_limit_exceptions: non-null host address bits in “xx.xx.xx.xx/24”, perhaps you should use “xx.xx.xx.0/24” instead
Sep 01 10:43:00 example.com postfix/smtpd[541590]: disconnect from mail-oi1-f175.google.com[209.85.167.175] ehlo=2 starttls=1 mail=1 rcpt=0/1 bdat=0/1 quit=1 commands=5/7
^C
[root@server ~]#

I appreciate for the help to fix this issue.

Thanks