Administration
Install anti-spam agents on Hub Transport server
If you’re using Exchange Server 2007 in a topology with an Edge Transport server, the anti-spam agents – Connection Filtering, Content Filter Hub Transport node…
Category
Security
Anti-spam
Spamhaus, the E360Insight lawsuit and the future of RBLs
If you’ve been keeping track of spam issues and RBLs, you probably took notice of the recent order by an Illinois court against leading RBL…
Administration
IMF: Gateway thresholds per server
So far we’ve known that Exchange Server 2003’s content filter – the Intelligent Message Filter (IMF), uses Gateway and Store thresholds and (Gateway) action that…
Administration
Disabling NDRs
RFC 2821 requires a SMTP host to send non-delivery report if a message is accepted but cannot be delivered, and the reverse path is *not…
Administration
Exchange Server 2007 exposes SCL in message headers
Exchange Server 2003’s Intelligent Message Filter (IMF) assigns a SCL— a value that indicates the probability of a message being spam – to every message…
Administration
Turning on Recipient Validation in Exchange Server 2007
The Edge Transport server role in Exchange Server 2007 performs messaging hygiene functions such as Connection Filtering, Sender & Recipient Filtering, Content Filtering, and SenderID…
Exchange 2007
Exchange Server 2007: Internet email without Edge servers
The Edge Transport server role is not a required role. It’s good to have if you don’t want to expose your domain-joined Exchange servers to…
Anti-spam
Texas spammer turns “antispam-activist” after million dollar settlement
In an interesting twist, Texas spammer Rylak Pitylak – listed as the world’s 4th “most prolific spammer” by Spamhaus – has turned over a new…
Administration
IMF: Archiving spam
As explained in previous posts, the Intelligent Message Filter (IMF) offers a few configuration options. The primary interface for configuring IMF is under Global Settings…
Administration
IMF does not scan messages larger than 3 Mb
Microsoft has just released a knowledgebase article – KB 907691 – documenting the inability of its Intelligent Message Filter (IMF) – the anti-spam filter that…