Hi Giuseppe T,

That is why I think this is a general IP block (URL:Mal is such a detection).
Your domain if found free of malware should be excluded.
That could be achieved by reporting it to avast team.

On the other hand they (avast! team members) are the only ones to realize the unblocking of the site.
They are known to react soon in such cases.
We here are just volunteers here and are into these analyses for the “good of our souls”,

polonus