Save all attachments at once

I receive an email with 27 images attached. To save them to my phone I must tap the download button below each preview plus “save” on the next page (evtl. after selecting download location). There is no signal (change of button color or similar) that an attachment is already saved or not.

My wish(es):

  • a possibility to download all attachments at once
    ( if it already exists and I have overseen it: thanks for pointing me to where I can find it)
  • some distinctive that signals whether an attachment was already saved or not

Have a nice day!

(Version 5.806 on Android 7.0, Samsung S6)