Mac Mail receiving emails extremely slowly

I recently purchased my first rMBP and I have noticed that Mail receives emails extremely slow. I receive the email on my iPhone 10 - 15 minutes before it appears on Mail.

I've tried searching for solutions however it doesn't seem like this is a problem many are having. Anyone have any solutions?

Solution 1:

In Mail there is a Activity view. Turn it on and see what is happening.

It looks like this

All the bars should disappear with in a 1-2 minutes.

Also check in the Mail preferences the setting for how frequently to check for Mail. Hope it is not set on 15 minutes but more frequently.