Hey there.  I would like to know if I can configure an Exchange server to send outbound smtp through spamfilter.  Exchange does not allow for authentication when doing this, but you can set email to send through a smart host at an IP address.  I attempted to add my IP address to the whitelist, but it does not allow me to send to a non-local domain this way.  I get the "no relay allowed" error in the logs.  I believe this should be possible, but I can't seem to find any good documentation on this feature.  I am running the Enterprise version.  Thanks.

Well... are you sure?  I understand the purpose of SpamFilter as I've been using it for years, but I do believe a method was added a while back to allow authenticated users to use spamfilter to relay email. 

ie:  see this thread.

That thread even makes it sound like I should be able to whitelist an IP to relay, but that doesn't appear to work for me.

My reasons are that I personally operate an Exchange server at my office and recently switched to a new block of IPs through Charter that were blacklisted when I received them.  So I need to have Exchange relay my outbound mail through a legit mail server until I can get my IPs off the blacklists.  I have used smarthosting with other mail servers in the past, but since the IP of my spamfilter install would likely never ever be on a blacklist, it seems like a great option to relay my outbound mail.  Thoughts?

hookjd, just to throw my 2 cents worth in:

hookjd,

As Dan correctly states, SpamFilter can be used to relay emails addressed to "the internet" (meaning to domains that are not in the "Local Domains".  To do this, either the sender's IP address needs to be added to the P whitelist, or you can use SMTP Authentication to authenticate the username of the sender.

Please do note however that SpamFilter will never forward emails to the internet directly. All emails in the above scenario wil be forwarded to your default "Destination SMTP Server" as configured in SpamFilter's Settings - Configuration tab. If this destination SMTP server is the same one that has SpamFilter configured as a smarthost, you'll be likely creating emails loops between SpamFilter and your Exchange server (Exchange uses SpamFilter as a smarthost, SpamFilter will then forward the emails back to Exchange, Exchange will then forward the to the SpamFilter smarthost, etc etc).

Also, fyi.  Every time I post on your forums I get an ASP error.  The post works, but the response page indicates an error.

Microsoft OLE DB Provider for SQL Server error '80004005'

Could not find server 'BACOLI' in sys.servers. Verify that the correct server name was specified. If necessary, execute the stored procedure sp_addlinkedserver to add the server to sys.servers.

/spamfilter/forums/new_post.asp, line 1085

Edited by hookjd - 17 January 2008 at 11:19pm