Quote:
Originally Posted by sayornis
A lot of the time, epubs I upload get rejected because they are epub v3 and the send to kindle feature only accepts epub v2 or lower. Calibre usually converts to epub v2 which is why conversion is an easy fix.
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Well, this is not true. I send ePub v3 (e.g. as converted by calibre) to send to kindle and they work fine.
But if it is not valid ePub (whether 2 or 3) in the first place, there's a good chance Send to Kindle will not accept them.
In that case, one needs to determine the nature of the invalidity and fix it (and maybe consider not getting ePub from that source in the future). Feeding it to calibre to convert to ePub 2 is not guaranteed to clean up these issues.