And that's a big "if," because at my school that is considered private information for the school's usage only. It would be a violation of privacy if it was just handed over to the PTA/PTO. Parents/guardians must OPT IN to any e-mail communication (other than emergency) from the school.
We would be in the same boat on this. While the district office tells us that the school is required to maintain a list of parents who have opted in to receive all communications, the school refuses to share that information with us.
That being said, there are other options. Do you have a local council of either all the PTA groups in the area or all of the parent groups in the district? If not, this could be a good time and reason to remedy that. In a recent controversial disagreement with our district, a notice to the school board telling them the amount of funding that the schools were receiving from all of the local parent groups combined, along with pointing out that they're well meaning policies would greatly inhibit our ability to continue with that work did the trick. And we knew that if having the discussion privately didn't work, bringing it up publicly at a school board meeting that was attended by local reporters, along with a few well placed letters to the editor would do the trick.
Something else to keep in mind is how few members of your community realize what the district is planning or all of the things that parent groups do for your local schools. In a recent survey we discovered that around 2/3 of our parents assumed that all of the things that our PTA does in our school are actually provided by the school, and that all we do is put on the monthly Family Fun Night. Getting that word out, both to your parents and to the community at large could lead to a backlash that will make the district rethink their position.
In this case talking with the district about both the reason for their decision and possible compromises may be in order. We agreed to limit communications to once a week on the same day each week, and to get principal approval on all flyers before sending them home.
Not really. In my school the PTA has to get approval for anything that is placed on the PTA webpage. Perhaps a completely independent website is a good idea...
As far as the website is concerned, we had the same issue with the school/district having control of the site itself. Our biggest problem was that their speed of updating our content was so slow that it was outdated by the time it got up there. We switched to our own site, and haven't had any problems at all. We just pointed out to the school that we were looking at a large amount of data that needed to go up and we didn't want to take away from the space and bandwidth that they were paying for, as well as the fact that we wanted to accept online payments and they didn't have the needed security encryptions accessible to us.
HTH!