This option will let you specify recipient email addresses and domain names you want to always exclude from greylisting. This is useful if you have an user that does not want incoming messages to be subject to greylisting. This will not exclude specific senders from greylisting. If you want to exclude senders from greylisting, you will need to exclude them by IP address. This is to prevent forged addresses from bypassing greylisting.
They are specified using full email addresses or fully qualified domain names