Postfix BlackList - Added and still being delivered, work around?

I have the following scenario.
Single server.
ISPConfig -> Email -> Postfix Blacklist -> added domain there.
I even tried 3 entries.

1. [email protected]
2. [email protected]
3. domain.tld

They are all marked as sender, email still come in 2 days after.

I checked /etc/postfix/main.cf for, smtpd_recipient_restrictions

Code:

"smtpd_recipient_restrictions = permit_mynetworks, reject_unknown_recipient_domain, reject_unlisted_recipient, permit_sasl_authenticated, reject_non_fqdn_recipient,>"

I ran, postconf smtpd_sender_restrictions

Code:

smtpd_sender_restrictions = permit_mynetworks, check_sender_access proxy:mysql:/etc/postfix/mysql-virtual_sender.cf, permit_sasl_authenticated, reject_non_fqdn_sender, reject_unlisted_sender

Is there anything I can check why it's not working or add something to check or can I do manually add a reject list like

Code:

smtpd_recipient_restrictions =
    check_recipient_access hash:/etc/postfix/recipient_access

Create a new file called /etc/postfix/recipient_access and add the domain I want to block to the file in the following format,

With, postmap /etc/postfix/recipient_access, postconf smtpd_recipient_restrictions, and finally with, service postfix restart.

I would rather do it Out of Box and not have to go this route.

Thanks,