If you have the Edge Transport Role installed on an Exchange 2010, mail may be rejected with the following error:
My.User@domain.com
mail.domain.com #<mail.domain.com #5.7.1 smtp; 550 5.7.1 Message rejected as spam by Content Filtering.> #SMTP#
Don’t ask me why Microsoft has buried this feature! From what I can tell, the only way to whitelist in Exchange 2010 is through the Powershell – not the GUI. Thanks to Chris Caldwell for the fix.
Specific Address
$list = (Get-ContentFilterConfig).BypassedSenders
$list.add("new.mail@address.com")
Set-ContentFilterConfig -BypassedSenders $list
Entire Domain
$list = (Get-ContentFilterConfig).BypassedSenderDomains
$list.add("domain.com")
Set-ContentFilterConfig -BypassedSenderDomains $list
Verfiy
Get-ContentFilterConfig
