Exchange Server 2003’s Connection Filtering feature allows you to block connections from IP addresses explicitly added to the Global Deny List, or drop messages from…
At times I’ve used the words Preference and Priority interchangeably to describe the numerical value in MX records that determines which record gets used first.…
RFC 2821 allows the use of a literal form of a recipient’s address, which uses the destination system’s IP address enclosed by square brackets in…
I wrote about logging SMTP protocol activity in Exchange Server 2003 in what is one of the most popular posts on Exchangepedia. Starting with Exchange…
One of the common complaints from users and many messaging folks is spam received from senders that appear to be from your own domain. SMTP…
RFCs 2821 and 1869 specify the format of HELO/EHLO commands issued by a SMTP client to initiate a SMTP session. RFC 2821 on HELO/EHLO command:…
Exchange 2007 includes a number of anti-spam agents to filter spam. The anti-spam agents log their actions in (anti-spam) agent logs. The default agent log…
This is one of the more frequently asked questions in different forums and still a major annoyance – how do I send as an alternate…
In Exchange Server Transport error: 452 4.3.1 Insufficient system resources we learned how the Back Pressure (Previous versions: Exchange 2010 | Exchange 2007) feature monitors…
In Exchange 2010/2007, you can use Email Address Policies to generate email addresses for your recipients (mailbox users, mail users, distribuiton groups, public folders, etc.).…