Administration
A Late New Year’s Resolution: Do Not Resolve Anonymous Senders
It’s probably a little late to make another New Year’s resolution, but I’ll try to convince you to make one nevertheless. By default, when an…
Category
SMTP
Anti-spam
Enabled by default: SMTP Tarpit in Exchange Server 2007
From a recent discussion, and something I’ve been wanting to post about for a while: SMTP tarpitting is enabled by default on Receive Connectors in…
Administration
SMTP Virtual Servers: Some irksome defaults you should change
The SMTP stack provided by IIS’ SMTP svc in Exchange Server 2003/2000 changes significantly when Exchange is installed on a Windows server. Some ESMTP extensions…
Anti-spam
Open Relay Database ORDB.org shuts down
After five and a half years, the non-profit organization ORDB is shutting down its DNS service (a Realtime Block List of open relays) and mailing…
Administration
Should MX record point to CNAME records (aliases)?
Though the practice of pointing MX records to CNAME (alias) records is not that uncommon, it certainly isn’t in keeping with internet standards. When you…
Administration
IMF: Where’s the whitelist?
Another frequently asked question – asked frequently enough to make its way here. Does the Intelligent Message Filter (IMF) v1/v2 in Exchange 2003 provide any…
Administration
HOW TO: Prevent sending display names with internet messages
Exchange Server and many other MTAs including most web-based services send the sender’s display name (e.g. “Joe User”) in email messages, in addition to the…
Exchange 2003
RFC 2821 and the “implicit MX” rule: Can you really get mail without an MX record?
This question has been asked frequently enough, so it makes sense to clarify another SMTP myth that many IT folks hold dear: No MX records…
Exchange 2007
Message Tracking from the command line in Exchange 2010 and Exchange 2007
I’ve forever envied folks (including some colleagues— you know who you are… ) on the Linux/Unix side of things who were able to parse text…
Administration
Logging SMTP protocol activity
Like many of my posts, this one also starts with “By default,… “. Like many folks, I’m always curious about the defaults used for almost…