Enable domain or email whitelist in Microsoft Exchange 2010

[Adventech]

PROBLEM:
How to Whitelist a domain or email address in Microsoft Exchange 2010?
Enable domain or email whitelist in Microsoft Exchange 2010.

SOLUTION:
Whitelist features are not available via Exchange Management Console (the GUI), so this will have to be completed via the Exchange Powershell.
Open powershell via the exchange menu item and run one of the following scripts, based on your requirement:

To check whats currently whitelisted (Bypassed Recipients):
Get-ContentFilterConfig

To whitelist a single email address:

$list = (Get-ContentFilterConfig).BypassedSenders
$list.add("*@domain.com")
Set-ContentFilterConfig -BypassedSenders $list

To whitelist an entire domain:
   
$list = (Get-ContentFilterConfig).BypassedSenderDomains
$list.add("domain.com")
Set-ContentFilterConfig -BypassedSenderDomains $list