535 authentication failure in SMTP

535 authentication failure in SMTP

Hi all,

I tried to use an email client (Sylpheed), after I followed the instructions in here: https://www.zoho.eu/mail/help/imap-access.html#EnableIMAP

I have a couple of problems. First, the folders I have in the zoho webmail have not appeared in the email client.

Second, when I'm trying to send an email from the client, it gives the following message: "Authentication failed: 535 Authentication Failed"

Snapshots of some of my configurations are attached, as well as a snapshot with the error message.

Thank you in advance