Reading emails from imap - How to scale?

[Mezai 279]

I am using imaps in camel route to read emails from an inbox, it takes 7-8
seconds for reading an email in the camel route. How can increase the
through put. I am expecting my inbox will be pounded with 5-6K emails an
hour.

I am using the below options
&delete=true&unseen=true&closeFolder=false&disconnect=false&consumer.delay=60000

Tried multple listeners (routes) but that reads all the emails on both the
listeners.

Thanks
Sasi