Hi all.
I am enabled in my Postfix Mail Server the option "Drop all emails if no rDNS/PTR". Since then I have not received messages from accounts related to google.com. The same happens for both: gmail accounts and for domains hosted on google.com.
I used a mx lookup tool to verify an account from which I should receive messages and the result is as follows:
Mail Server Report
mx:domain-checked.com - 1 Tests Failed
dmarc domain-checked.com DNS Record not found
smtp aspmx.l.google.com Reverse DNS does not match SMTP Banner
smtp alt1.aspmx.l.google.com Reverse DNS does not match SMTP Banner
spf domain-checked.com DNS Record found
spf domain-checked.com SPF Record found
What is wrong?