To disable greylisting (graylisting) you will need to login as an admin and follow these simple steps.

1. Expand “Domains” and click on “All Domains” and find the domain you wish to disable greylisting for.
2. Right click on the domain and select “Edit”
3. Select the “Technical” tab
4. Check the box for “Disable Greylisting”
5. Click “Save”

Greylisting should now be disabled for this domain.