It's clear from the PJ files that UK police investigated matters on their own initiative without being requested to do so by the appropriate authorities.
At the time this email was recieved the appropriate authorities were not chasing vague leads suggesting abduction.
Indeed. Amaral was investigating Kate and Gerry McCann. Having totally given up on Madeleine and whatever had happened to her. Which is why he was so incensed when information arrived with allegations of a kidnap.
Later competent investigation proved beyond a doubt that his notions were totally invalid and the reopening of the Policia Judiciaria investigation into madeleine's case in 2013 which centred on her abduction proves that things had progressed way beyond his botched betrayal of Madeleine back in the dark days of 2007.
Did I forget to mention that
everything Amaral's investigation had thought was evidence which was used to make the McCanns arguidos was proved otherwise by the Policia Judiciaria and gives a huge clue as to why he is pushing the notion of Brueckner as a 'scapegoat'.