Email parsing not happening properly

Hello,
Email parsing on my EasyDiscuss enabled site is not happening properly. It was working fine but after previous (or before), it stopped working. It says it is processing it but it retrieves only 1 email everytime. There are definitely more than 50-100 emails that are not brought in.

Also auto email parsing is not happening as well. I enabled the cron job but that is taking lot of resources and got i got warnings from my hosting provider.

Please advise on how to fix these..

Thanks