![]() ![]() C:\>Set-IPBlockListProvider Spamhaus -RejectionResponse "IP address is listed by Spamhaus Zen." Note you can change the rejection message that it sent back to the sender. C:\>Add-IPBlockListProvider -Name Spamhaus -LookupDomain -AnyMatch $true -Enabled $true -RejectionResponse "IP address is listed by Spamhaus" To add Spamhaus to your connection filter agent run the follow Exchange Management Shell command on the Edge Transport server. ![]() However this is quite inefficient, as you’ll constantly be adding new IP addresses to the list.Ī more effective approach is to use one or more IP block list providers, such as Spamhaus (my personal favourite) or SpamCop. When your Exchange organization is receiving spam you can add the IP addresses of the spammers to an IP block list on the Edge Transport server. It makes the decision by looking up the IP address in a block list, allow list, or by querying a block/allow list provider. The connection filter agent looks at the IP address of a server that is making an SMTP connection to the Edge Transport server and decides whether to block or allow the connection. ![]() One of the transport agents that is installed on the Exchange 2013 Edge Transport server is the connection filter agent. ![]()
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