Thunderbird doesn't receive the messages for my zoho adress

Thunderbird doesn't receive the messages for my zoho adress

Hi,

I've noticed thunderbird doesn't receive the messages for the zoho address I've created. When I try from other adresses, it says the message has been sent but it never appears on the screen. I have tried with pop and imap,changed le ports, nothing works. I don't find the messages on zoho either. Of course the outgoing mail works because it doesn't rely on zoho.
Besides, I have a password for the address I have checked as default address but it regularly says the password is wrong.  The logging address also says it has no alias but when I try to fill in the default address, it says it is already registered.
I have already sent numerous professionnal emails with my default address (it seemed to work yesterday) and I cannot get the answers.
I would gladly welcome answers, otherwise I will stop using zoho, time devouring with no result.
Thank you