can’t register new email

- What happens when you try to set up the account in Thunderbird? Please quote all error messages you see in full. Screen shots would suffice. - What is your operating system? - What anti-virus, security, or network "helper" programs do you use, if any? - What version of Thunderbird? Here are their recommended settings, according to their help page: https://www.zoho.com/mail/help/thunderbird-imap-access.html - I note that they distinguish between "personal users" and "organization users with a domain-based account." Which are you? Your settings look correct, but you don't mention the Connection Security or Authentication Method. But then, neither do they, except in their image. I believe that the IMAP server needs IMAP Connection Security: SSL/TLS IMAP Authentication Method: Normal Password and SMTP: SMTP Connection Security: This is vague. Port 465 is the standard port for SSL/TLS, but they are not explicit. SMTP Authentication Method: Normal Password Are those your settings?