Unfortunately not much leadership to show. What you are looking for is fully supported on AWS by storing / filtering inbound email directly to S3 buckets etc etc.
I won't copy the link, but you can read their blogpost of 28 SEP 2015. I'm not affiliated with AWS - just a happy customer using the best of both worlds. Marcel -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to google-appengine+unsubscr...@googlegroups.com. To post to this group, send email to google-appengine@googlegroups.com. Visit this group at http://groups.google.com/group/google-appengine. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/1670d399-acff-4eff-a888-99e98f52a31f%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.