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
SMTP
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
Address Literals and Microsoft Exchange
RFC 2821 specifies how address literals can be used to reach recipients – particularly useful when DNS resolution doesn’t work for a particular domain or…
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
Windows Vista and telnet
Fired up the console (command prompt) in Windows Vista and can’t telnet to smtp or use telnet at all for that matter? Just noticed this…
Administration
Telling Exchange about (non-Exchange) SMTP servers
For anti-spam agents like IP Block List providers (aka DNSBLs/RBLs), and Sender ID, it is important to know about which non-Exchange SMTP servers receive inbound…
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…
Google
HELO RFC 2821: Telnetting to Gmail’s SMTP servers
Telnetting to SMTP port of a mail server is a common troubleshooting task to test SMTP connectivity and mail flow that most of us do…
Administration
Troubleshooting IMF: Important performance counter
Earlier today I saw some strange behavior with Intelligent Message Filter (IMF) v2. Incoming internet mail wasn’t getting scanned by IMF. Outlook did not show…