WHM 11.52 Greylisting feature issue

I activated the greylisting feature at WHM with a deferral time of 2 minutes (cause the default of 10 I think is too much)

Doing this adds some URIBL - BARRACUDA and SPAMRATS configurations to exim. But after activating the greylist feature. No new mail arrives to any account.

Checking the logs I see things like. ie: sending a test email from a gmail.com account to a server account, happens the same with any account outside the server:

2016-02-11 23:03:59 H=mail-lf0-f51.google.com [209.85.215.51]:36028 X=TLSv1:AES128-SHA:128 CV=no F=<test@gmail.com> rejected RCPT <test@domain.com>: "JunkMail rejected - mail-lf0-f51.google.com [209.85.215.51]:36028 - gmail.com - is in black.uribl.com, see: 127.0.0.1 -> Query Refused. See URIBL.COM - Realtime URI Blacklist for more information [Your DNS IP: 8.0.7.0]"

I wait, wait, wait and nothing happens after several minutes. So I disabled the feature.

What is going on? Removing the uribl lines from exim, enables the server to receive emails again.

Thank you