Slow and unreliable email forwarding, and not deleting zoho's copy

Slow and unreliable email forwarding, and not deleting zoho's copy

I have my zoho email setup on my hotmail account, but it's really slow at forwarding emails... I have forwarding emails, plus pop3 and smtp setup, but it seems like half my emails are just not being retrieved or forwarded, not to mention the original copy is still left in zoho mail when I have specifically checked "Delete zoho copy".