Quote:
Originally Posted by kovidgoyal
Authentication credentials invalid means gmx thinks your username and/or password are invalid. If you are sure they are correct make sure you have enabled SMTP sending in the GMX account preferences as descibed in the FAQ https://manual.calibre-ebook.com/faq...-using-calibre |
Part of the problem I think may be that GMX can't seem to text my phone an authentication code to verify my phone and I guess set up the account. I've emailed them about this, and verified it's the correct #, but no luck. They are very slow to reply at each step.
Is there a link to instructions that explain setup in a more general way? The only ones I've seen are specific to gmx and gmail. That way I could try with a different email service.
Chris