[Libreoffice] Questions about push access

Hello, let me ask a few questions.

1. I've performed my first push today and received this message:

2011/10/6 <libreoffice-commits-bounces@lists.freedesktop.org>
> Your mail to 'Libreoffice-commits' with the subject
>
>    .: tools/source
>
> Is being held until the list moderator can review it for approval.
>
> The reason it is being held:
>
>    Post by non-member to a members-only list
>
> Either the message will get posted to the list, or you will receive
> notification of the moderator's decision.  If you would like to cancel
> this posting, please visit the following URL:

I've canceled posting foolishly. I was not supposed to do that, was I?
And is it possible not to receive such mailings?

2. What changes should I avoid in my commits? I mean, what changes are
unwanted, needless, etc.

Thanks.