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elbuckie · 01-10-2025, 09:41 AM

I am unable to send eBooks via email for some reason. It used to work before but no longer does.

smtplib.SMTPAuthenticationError: (535, b'Authentication credentials invalid')

01-10-2025, 09:41 AM	#1
elbuckie Junior Member Posts: 6 Karma: 10 Join Date: Jan 2025 Device: kindle paperwhite	Calibre test email failed I am unable to send eBooks via email for some reason. It used to work before but no longer does. smtplib.SMTPAuthenticationError: (535, b'Authentication credentials invalid')