# Calibre can optionally use a server to send mail

I tried calibre share/send to, but it failed with:

Sending failed...

Traceback (most recent call last):
File "/usr/lib/calibre/calibre/gui2/email.py", line 44, in run
self.func(*self.args)


I was just curious, really, how calibre sends to my Kindle account because I don't recall authorizing it, nor do I see sent messages from it. (Not that I configured it with my e-mail settings.)

Does Amazon just "trust" the calibre software? if so, good. Curious.

Yes, I suppose I could go look in the above python script...

• yes, I entered an e-mail address (didn't realize that). My point is that I never provided a password -- so the e-mail isn't really "from" me, it's from Calibre. Which is kinda curious. I'm thankful that it works, and, no I don't want a ton of attachments in my sent mail box. So Calibre must be sending through their own server...no? There's an option to provide credentials. – Thufir Dec 30 '18 at 12:55