Thank you for using the Send to Kindle service to send your documents to your Kindle. This is a final reminder that on November 1, 2023, we will start winding down support for sending MOBI (.mobi, .azw, .prc) files through Send to Kindle. This change will impact sending MOBI files through Send to Kindle for Email, Kindle apps on iOS and Android, and Send to Kindle apps for Windows and Mac. We will end all Send to Kindle support for MOBI files by December 20, 2023. MOBI documents already in your Kindle library and other document formats will not be affected by this change.