Below are screen shots from the product that highlight the feature I believe would suit your question the best:
This is a screen shot of the main page of the product:Figure 1. This page outlines the three main components of the product -- performance, mail flow and database recovery management.
Once you select Mail Flow Troubleshooter, you will see the following page (figure 2) which lists various symptoms. You will notice one option that matches your original question:Figure 2. The Exchange Mail Flow Troubleshooter.
If you Next through a couple more pages of environment specific data, you should be able to identify the mail flow issues in your environment.
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This was first published in July 2007