GetTor obsolete mirror list
It seems that in case of email rejection due to attachment size limit, the GetTor bot sends an email that links to old and broken mirrors of TBB, Specifically, those two addresses: https://www.oignon.net/dist/torbrowser/ https://tor.beme-it.de/dist/torbrowser/
They should obviously be replaced by updated links from the mirror list: https://www.torproject.org/getinvolved/mirrors.html.en
I learned of this bug from the Transifex translation project, where user "runasand" added this notification for translation about two years ago. Since it was two years ago, it is possible that the problem is not actually in GetTor (english version) but rather with the Transifex coordination team that isn't updating the links routinely. Anyway, it seems right now GetTor at least in all languages except english gives these broken links.