I have an email server Postfix and Dovecot installed on a EC2 instance in AWS.
I can send emails when connected to the webmail, but cant send mail through any PC or mobile phone email client.
This is the error I get on the log:
addr x.x.x.x(my client ip address) listed by domain [url removed, login to view] as [url removed, login to view]
May 22 00:07:44 mail postfix/postscreen: DNSBL rank 3 for [x.x.x.x]:53706
I need some who help me solve this issue and set up secure but functional policies.