I would set new Antispam entry to White list on Exchange Server 2007 but I got error
The IP List entry operation has failed with an exception. The error message is: "Access is denied" It was runnig command 'get-IpAllowListEntry -Server 'SERVER"
The error is caused by insufficient permissions. Reason is described in “How to Delegate Server Administration” on http://technet.microsoft.com/en-us/library/bb331957(EXCHG.80).aspx
You need set ServerAdmin role to your account:
Add-ExchangeAdministrator -Identity "contoso.com/Users/KwekuA" -Role ServerAdmin -Scope server1.contoso.com