I currently have my EC2 connected to mail.domail.com and configured A record to point EC2 ip, PTR record pointing at EC2 ip and i have a MX record for domain.com pointing at mail.domain.com, currently the config works fine but when i tried to add AWS load balancer website mail.domain.com works properly can even see the Amazon cert. but when1 i try to send mail nothing is coming in or out. i saw similar question here and tried to ask there but comment was deleted.
the guy spoke so vaguely and none descriptive couldnt make much out of it. even if someone can explain what the guy in the link is saying in the link in a detailed way would be greeeat.
edit/update: upon viewing my header files the problem arose in my dmarc, dkim and also spf headers... according to google they all failed and according to mail-tester.com my lovely 9.7 was now a not bad 6.5... i reset all settings to dig