Amazon is removing support for sending MOBI format using the various send-to-kindle apps and web pages. MOBI will continue to work when sideloaded via USB. (Added: MOBI files sent using send-to-kindle prior to the cutoff can be saved in the user's account and can delivered to Kindles any time later with no cutoff of support in sight.)
EPUB is supported via send-to-kindle and will be converted to the appropriate Kindle format based on the target device: KFX for Scribes, KF8 for most other Kindles, MOBI for very old Kindles and the iOS app. This support is not going away.
Last edited by jhowell; 07-22-2023 at 12:41 PM.
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