You requested it... and we delivered it in Exchange 2010! One of the most requested items in exchange 2007 was something like this... ...we have 5-12 external domains that we need to allow some users to send to, but prevent sending to all other domains... Or like this... ...we need a way to allow everyone...

Can't send or receive email? The Mail Flow Guided Walkthrough (GWT) can help. Problems with mail delivery can be a very frustrating for both the user and the administrator. Unfortunately, mail flow issues aren't uncommon and will likely occur at some point in time whether your mailboxes are hosted...

An important factor in maintaining consistent spam protection over time is ensuring updates to the anti-spam filters are in place. Microsoft Exchange Server 2007 leverages the proven Microsoft Update infrastructure for providing anti-spam filter updates and, by default, administrators can visit the...

EDIT 10/14/2009: We updated the section that recommends settings for environments that need to support messages larger than default 10MB message size . Already an expert on large messages? You'll still want to check out the updated "Best Practices" section below to harden your server against possible...

Transport Dumpster is a new feature of Exchange Server 2007 Hub Transport servers through which the transport can defer the deletion of certain emails in their queues. The condition for an email to be retained in the transport dumpster is that at least one of the recipient’s mailboxes must resides on...

This is just a quick note that the regularly scheduled Exchange Server 2003 Intelligent Message Filter update that was set to be released on 1/7/2009 will not be happening. The next release for this update will be on 1/21/2009. For those that might not know, this update is released on the first and...

I'm a support enginer in CSS . I was working with a customer who reported a mail loop error for a specific domain like contoso.com . This error was only observed in large emails. Yeah that’s really mysterious until you figure out that the mail loop is due to size restriction on the Send connector...

We're exploring making improvements to the experience of configuring Transport Rules. As part of this, we want to make sure we account for exactly how you are using Transport Rules today. The script linked to below will output some Transport Rules usage data. If you are using transport rules today in...