Hi Matteo45,
I mean as general it isn’t an elegant solution, a 301 isn’t.
These test however were passed succesfully: http://mobilefriendlytest.website/index.php
Mind the advice there. The refresh gets carried through resolving in multiple alert boxes.
If there were a malicious Meta Tag it would not be visible for the public (visitors).
In that case the easiest and safest fix is to completely wipe your public server space and DB,
then reinstall from a known clean backup.
polonus