Hi there,
We observed multiple exceptions regarding msg files. I think, if the files are not actual msg files, it would make sense to throwing an exception telling that the documents are corrupted.
GroupDocs.Metadata.…...Parser.Parser.GetMetadata()\r\n at \u0003\u0016\u000F...rItem \u0002) at GroupDocs.Parser.Data.ContainerItem.OpenParser(LoadOptions...