function doPost(e){
  var re=/(([^<>()\[\]\\.,;:\s@""]+(\.[^<>()\[\]\\.,;:\s@""]+)*)|("".+""))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))/gi; 
  return ContentService.createTextOutput(
    JSON.stringify(
      JSON.parse(e.postData.contents).map(
        function(a){
          try{
            a.a=a.MyText.match(re).join(', ')
          }catch(e){
            a.a=null
          }
          return a
        }
      )
    )
  )
  .setMimeType(ContentService.MimeType.JSON);
}

Table.FromRecords(
    Json.Document(
        Web.Contents(
            "https://script.google.com/macros/s/AKfycbwj8B-iRsCdVafdNiWlfq5lPRpRJCRZK7k9V3bDFdMJBPw3YC3G/exec", 
            [
                Headers = [
                              Accept="application/json", 
                              #"Content-Type"="application/json"
                          ], 
                Content = Json.FromValue(
                              Excel.CurrentWorkbook(){[Name = "Таблица1"]}[Content]
                          )
            ]
        )
    )
)