In case you don't know this already/can do something about it, I think reddit has altervista domain blacklisted, so whenever you post some altervista link your post is hidden from public view/visible to author only, in practice nuked.
Thanks, I just tried and it seems to work, I feel silly, they probably whitelisted it after last time I tried without me realizing it, let's hope it keeps working
[EDIT]I talked too soon...
after a while, posts are still removed. Maybe it's some idiot setting of subreddit admins. Oh well, thanks for trying.