message: filename for attached images
diff: @@ -928,7 +928,9 @@ def send_email_smtp( # pylint: disable=invalid-name,too-many-arguments,too-many
  # Attach any inline images, which may be required for display in
  # HTML content (inline)
  for msgid, imgdata in (images or {}).items():
  - image = MIMEImage(imgdata)
  + formatted_time = formatdate(localtime=True)
  + file_name = f"{subject} {formatted_time}"
  + image = MIMEImage(imgdata, name=file_name)
  image.add_header("Content-ID", "<%s>" % msgid)
  image.add_header("Content-Disposition", "inline")
  msg.attach(image)
  