Can't Send Email to Google Apps

Hi,

On my server i can't send mail to google apps. But can send to all other account including normal gmail account.

CLOUDLINUX 6.5 x86_64 standard – WHM 11.44.1 (build 18)
Load Averages: 0.96 1.24 1.71

Google apps users, getting bounce back email with below error message:

Code:

host aspmx2.googlemail.com [64.233.176.26]: 450-4.2.1 The user you are trying to contact is receiving mail at a rate that
450-4.2.1 prevents additional messages from being delivered. Please resend your
450-4.2.1 message at a later time. If the user is able to receive mail at that
450-4.2.1 time, your message will be delivered. For more information, please
450-4.2.1 visit
450 4.2.1 http://support.google.com/mail/bin/answer.py?answer=6592 5si12967371yhp.173 - gsmtp:
 retry timeout exceeded

/var/log/exim_mainlog says

Code:

2014-09-28 05:06:28 1XYBN4-001GI1-5I SMTP error from remote mail server after RCPT TO:<info@xxx.com>: host aspmx.l.google.com [74.125.194.26]: 450-4.2.1 The user you are trying to contact is receiving mail at a rate that\n450-4.2.1 prevents additional messages from being delivered. Please resend your\n450-4.2.1 message at a later time. If the user is able to receive mail at that\n450-4.2.1 time, your message will be delivered. For more information, please\n450-4.2.1 visit\n450 4.2.1 http://support.google.com/mail/bin/answer.py?answer=6592 pr10si471618obc.102 - gsmtp

All domains which hosted on this server facing same issue as they are not able to send emails to Google Apps user accounts.

Please help me to resolve this issue.

Thanks in Advance..

 

Thanks for your reply.

There are too many CSF alert mails from server to google apps account . Now I disabled some CSF mail alert.

Hope this will fix the issue.