I wish there was a longer list time too, but you know there is a "take all attachments" button in your mailbox, right? Just mark the checkbox for each returned email and use that "take all" button and it will automatically give you back your creds and items from the selected emails.
You can also use the select all, and then the 'take all' button. Just two clicks, and you have both attached cash and items back. But make sure you don't accidentally hit the 'delete' button in between, since it has NO confirmation (yes, I found out the hard way, with several mails with attachments selected, ouch!)