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monophoto · 11-04-2022, 08:13 AM

I attempted to have Calibre transfer a book to my Kindle reader this morning, and received the following error message:

Sending failed...

Traceback (most recent call last):
File "calibre\gui2\email.py", line 47, in run
File "calibre\gui2\email.py", line 136, in sendmail
File "calibre\utils\smtp.py", line 162, in sendmail
File "calibre\utils\smtp.py", line 142, in sendmail_direct
OSError: Failed to send mail: SMTPRecipientsRefused({'XXXXXXXX@kindle.com': (550, b'5.7.1 IP address blacklisted by recipient')})

I was able to generate an e-mail in Outlook that successfully reached my Kindle.

Am I correct in interpreting this to mean that Amazon's 'Send to Kindle' server is rejecting e-mails originating at Calibre?

11-04-2022, 08:13 AM	#1
monophoto Connoisseur Posts: 52 Karma: 2492712 Join Date: Jun 2022 Location: Saratoga Springs, NY Device: Kindle Paperwhite, Amazon Fire HD8 (2020)	'Send to Kindle' Function Malfunction I attempted to have Calibre transfer a book to my Kindle reader this morning, and received the following error message: Sending failed... Traceback (most recent call last): File "calibre\gui2\email.py", line 47, in run File "calibre\gui2\email.py", line 136, in sendmail File "calibre\utils\smtp.py", line 162, in sendmail File "calibre\utils\smtp.py", line 142, in sendmail_direct OSError: Failed to send mail: SMTPRecipientsRefused({'XXXXXXXX@kindle.com': (550, b'5.7.1 IP address blacklisted by recipient')}) I was able to generate an e-mail in Outlook that successfully reached my Kindle. Am I correct in interpreting this to mean that Amazon's 'Send to Kindle' server is rejecting e-mails originating at Calibre?