Here are the answerers to your questions.
1. Who Keeps the lists updated?
This list was made in-house we make sure that it's updated.
2.Does Trusted Domains and Trusted email address also affect the greylist filter or only the antispam?
Trusted Domains and Senders will bypass Greylisting
3.There is confusion on the statistics that does not allow me to understand the effectiveness of the greylist. If we go to the reports and analyze greylisted connections, the daily values are indicated for Passed, Blocked, Total at the trend and domains level. But if I then choose a single domain the same numbers are presented as Connections Allowed, Connections Delayed, Total
We have an audit of the reports being done this will likely be changed in the future to be more intuitive.
Please let me know if you have any questions.
Technical Support Specialist