[TYPO3-english] Postmaster Failures

[Denyer Ec]

Hi all,

When trying to post to  the Typo3 v5 mailling list I always receive
the following response:

----------------------
This is an automatically generated Delivery Status Notification.

Delivery to the following recipients failed.

      n.mainiero at cenit.de

Final-Recipient: rfc822;n.mainiero at cenit.de
Action: failed
Status: 5.1.1
----------------------


The address I am attempting to mail is:
<typo3-project-5_0-general at lists.netfielders.de>

Has anyone got any suggestions as to what is going wrong here, or who
I should contact directly to resolve it? I am using GMail as my mail
client to interact with the maillinglists.

Many thanks,
Denyer