If your site account was opened after 10/17/2017. Greylisting has been disabled by default.
If you are certain that you want to disable greylisting, follow these instructions. Greylisting must be disabled on a per user basis, and you must be logged in as the Primary Domain Administrator ("email@example.com" by default).
- Log in to Control Panel.
- Click the "SmarterMail Manager" link on the left side.
- Click the "SmarterMail Management Login as Primary Admin" link. You will be automatically logged in as the Primary Domain Administrator.
- Once in the SmarterMail interface, click the "Settings" link in the left navigation (it is an icon that looks like gears).
- Click to expand the "Domain Settings" folder.
- Click "Users".
- Check the box next to the account you want to disable Greylisting for, and click "Edit".
- Check the box next to "Disable Greylisting".
- Click "Save".