Concurrenty checking mail via IMAP (Your account is currently not accessible via IMAP due to excessive usage. Kindly try after some time)

Concurrenty checking mail via IMAP (Your account is currently not accessible via IMAP due to excessive usage. Kindly try after some time)

Hello,

I'm trying to access my inbox on IMAP from my server. I have set 10 threads to concurrently check the email
SO whenever a request from a client comes one of thread connect through IMAP, check mail and then disconnect.

But After some times I get this"

Your account is currently not accessible via IMAP due to excessive usage. Kindly try after some time.

What is the recommended to concurently check for mail? How much connection can I make?

thank you