How to send .epub directly on Kindle Jailbroken

Hi guys, I'm still considering if , for my use, will be a worth or not to jailbreak my Kindle Paperwhite 11Th, now I use to download the books in .epub format, converter through Calibre on PC and send through my Kindle account ( xxx@kindle.com) on my Kindle.
So the question is:
After jailbreak can I send directly .epub through Kindle account (xxx@kindle.com) or not? I think not because Kindle account doesn't allow .epub to be sent...and/or can I diretly on kindle Browser find the website where I use to download my books and download it directly on Kindle folder in .epub and later open it through Koreader?

Differently If I should pass the .epub through PC I don't think will change to much compared now...because now I conventer and send...later I'll link Kinlde to PC to get the books...

Thanks