let
Source = Excel.CurrentWorkbook(){[Name="T_Dons"]}[Content],
ModType = Table.TransformColumnTypes(Source, {{"Date", type date},{"Montant", type number}}, "en-US"),
Total = Table.Group(ModType, {"Email","Date"}, {{"Montant des dons", each List.Sum([Montant]), type nullable number}}),
Email = Table.ReplaceValue(Total,each [Email],each "'=LIEN_HYPERTEXTE(""mailto:" & [Email] & """;""" & [Email] & """)",Replacer.ReplaceText,{"Email"})
in
Email