Remote Email Exchanger not routing

Hi I need help, after I have done a lot of research, I am sure that my WHM is not performing as expected. Remote Email Exchanger not routing remote domain. This problem happens on my new migrated server through WHM migration function not old server. The migration seem like imports old server settings and misconfigure the new one, I am sure its somewhere and I need to have your advise to look it up. The DNS is setup correct, here is my post dns not resolving remote domain when local zone file exist Here is similar post without answered yet. Email Forwarder to Remote Mail Server Not Working To be clear that remote domain is not in /etc/localdomains , and exist on /etc/remotedomains . A remote domain example.com have great working gmail MX record . Set forth, #1 When I send email, its routing to local zone file MX 0 example.com, and receive error like below 2017-09-30 06:14:42 cwd=/var/spool/exim 3 args: /usr/sbin/exim -Mc 1dyHbO-0006AF-RA 2017-09-30 06:14:42 1dyHbO-0006A8-An Completed 2017-09-30 06:14:42 1dyHbO-0006AF-RA Sender identification U=mailnull D=-system- S=mailnull 2017-09-30 06:14:42 SMTP connection from [52.8.29.44]:48986 (TCP/IP connection count = 1) 2017-09-30 06:14:43 H=ec2-52-8-29-44.us-west-1.compute.amazonaws.com (ws.na.us.ca.01.depresmas.com) [52.8.29.44]:48986 X=TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256 CV=no F=<> rejected RCPT : Rejected relay attempt: '52.8.29.44' From: '' To: 'enlightenment@ws.na.us.ca.01.depresmas.com' 2017-09-30 06:14:43 H=ec2-52-8-29-44.us-west-1.compute.amazonaws.com (ws.na.us.ca.01.depresmas.com) [52.8.29.44]:48986 Warning: "Detected session with all messages failed" 2017-09-30 06:14:43 1dyHbO-0006AF-RA ** enlightenment@ws.na.us.ca.01.depresmas.com R=dkim_lookuphost T=dkim_remote_smtp H=ws.na.us.ca.01.depresmas.com [52.8.29.44] X=TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256 CV=yes: SMTP error from remote mail server after RCPT TO:: 550-Please turn on SMTP Authentication in your mail client.\n550-ec2-52-8-29-44.us-west-1.compute.amazonaws.com\n550-(ws.na.us.ca.01.depresmas.com) [52.8.29.44]:48986 is not permitted to relay\n550 through this server without authentication. #2 When I removed / disabled zone file for example.com, or change the local zone file MX record to match remote will have correct result like below 2017-09-30 06:12:09 cwd=/home/enlightenment/public_html/d 3 args: /usr/sbin/sendmail -t -i 2017-09-30 06:12:09 1dyHYv-00067W-Jj <= enlightenment@ws.na.us.ca.01.depresmas.com U=enlightenment P=local S=545 T="PHP Mail Test script" for micah.tominaga@enlightenment.support 2017-09-30 06:12:09 cwd=/var/spool/exim 3 args: /usr/sbin/exim -Mc 1dyHYv-00067W-Jj 2017-09-30 06:12:09 1dyHYv-00067W-Jj Sender identification U=enlightenment D=enlightenment.support S=enlightenment 2017-09-30 06:12:09 1dyHYv-00067W-Jj SMTP connection outbound 1506777129 1dyHYv-00067W-Jj enlightenment.support micah.tominaga@enlightenment.support 2017-09-30 06:12:10 1dyHYv-00067W-Jj => micah.tominaga@enlightenment.support R=lookuphost T=remote_smtp H=aspmx.l.google.com [74.125.135.27] X=TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128 CV=yes C="250 2.0.0 OK 1506777130 b3si4834579plb.505 - gsmtp" 2017-09-30 06:12:10 1dyHYv-00067W-Jj Completed This is the proof that remote email exchange is somehow not function in my new server. Please advise and help !!!