can't post in grails user forum

[haah]

hello
when i try to post a new post in the grails user forum it will send me an email saying subject "failure notice"

Hi. This is the qmail-send program at mail.codehaus.org.
I'm afraid I wasn't able to deliver your message to the following addresses.
This is a permanent error; I've given up. Sorry it didn't work out.

<user-allow-subscribe-ckshn=[e-mail]>:
ezmlm-manage: fatal: Sorry, I've been told to reject all requests (#5.7.2)
why is it rejecting ?

[Hugo <Nabble>]

This problem seems to be on the mailing list server, not Nabble. Please try to send an email to the mailing list without using Nabble and see if it works. If you still experience problems, then you should contact the mailing list owner.

[haah]

ok thanks :)