Gsuite split delivery

Hi Guys, We try to setup g suite split delivery. but we get the follow e-mail back from the gmail server: Message not delivered Your message couldn't be delivered to local@example.net because the remote server is misconfigured. See technical details below for more information. The response was: 550 Please turn on SMTP Authentication in your mail client. mail-wr0-f200.google.com [209.85.128.200]:42669 is not permitted to relay through this server without authentication. When we access the /var/log/exim_mainlog we see: 2018-06-07 17:41:08 SMTP connection from [209.85.xxx.xxx]:52674 (TCP/IP connection count = 1) 2018-06-07 17:41:34 SMTP connection from [103.236.xxx.xx]:41581 (TCP/IP connection count = 2) 2018-06-07 17:41:34 no host name found for IP address 103.236.xxx.xx 2018-06-07 17:41:49 H=mail-wr0-f199.google.com [209.85.xxx.xxx]:52674 X=TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128 CV=no F= rejected RCPT : Rejected relay attempt: '209.85.xxx.xxx' From: 'info@example.com' To: 'local@example.net' 2018-06-07 17:41:49 H=mail-wr0-f199.google.com [209.85.xxx.xxx]:52674 Warning: "Detected session with all messages failed" 2018-06-07 17:41:49 H=mail-wr0-f199.google.com [209.85.xxx.xxx]:52674 Warning: "Increment slow_fail_block Ratelimit - mail-wr0-f199.google.com [209.85.xxx.xxx]:52674 because of all messages failed" 2018-06-07 17:41:49 SMTP connection from mail-wr0-f199.google.com [209.85.xxx.xxx]:52674 closed by QUIT