I'm interested in blocking additional spam messages coming through by use of the antispamagents.ps1 on my mailbox servers. Our current setup is the following:
Internet> 3rd party email filter> Exchange Mailbox server
My question is, if I turn on the antispamagents.ps1 and add spamhaus as a blocklist provider, will it block based on blacklisted IPs? My concern is that it won't do anything because it's not the next hop from the Internet.
Our current 3rd party email filter isn't really doing a good job. I've analyzed the headers and the sending IP is confirmed as blacklisted according to SpamHaus Zen.
Thanks in advance!