Cant download new messagens POP

Cant download new messagens POP

Hi

Approximately 4 days I'm has a problem to download messages via Thunderbird.

Thunderbird show the message: verifying new messages, but never download the messagens.

I tried to disable pop access and enable again. When I did this change the Thunderbird download all messages in the database (approximately 8000 messages).

Now I have only three messagens in zoho mail webmail, but I cant download them.

How can I solve the problem?

Thank you