_mj6o

You can upload as many files as you want in one go.

No limit on the number of ebooks you can send, but the max size for any one file is ~20MB

Huh that's weird. I'm looking at the logs, and this is the first time that's ever happened. It will usually just spit out the following introductory text:

  Hi there! Send me your ebooks and I'll send them to your Kindle.
  To get started, I'll need you to first tell me your Kindle's email address.
  This can be found on your Kindle management page: https://www.amazon.com/gp/digital/fiona/manage?ie=UTF8#pdocSettings

  (ending with @kindle.com)

Will look into this, thanks!

Semi-related: I wrote a fb messenger bot [1] which can send any ebooks (including epub) to your kindle.

It's handy if you've only got access to an epub, and a bit less clunky than sending via email.

[1] https://m.me/kindleebooksender