Open relay in Microsoft Exchange 2010 (and 2007)

by Barry Gill on September 1, 2010

Amazingly there are still many companies out there today who still manage to forget to close off their Exchange server’s native ability to provide a full open relay.

So just a quick note for you, a very easy way to make sure you aren’t an open relay is to run the following command from the Exchange Management Shell.

Get-ReceiveConnector “ReceiveConnectorName” | Remove-ADPermission -User “NT AUTHORITY\ANONYMOUS LOGON” -ExtendedRights “ms-Exch-SMTP-Accept-Any-Recipient”

Don’t forget to replace ReceiveConnectorName with the name of your own receive connector.

That is it, couldn’t be easier, don’t let your system become a spammer!

There are a number of online tools that can help you to check the status of your server to see if you are an open relay or not, I typically use MXToolbox.


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Getting behind the botnet, a solution?

by Orlando Scott-Cowley on August 31, 2010

Our friends at MessageLabs released their monthly Intelligence Report this week. A number of other outlets and blogs have already reported on the prevalence of the Rustock Botnet, accounting for up-to 41% of spam. The MessageLabs report also goes onto highlight the current spam rate  at an alarmingly high 92.2%, up from 88% in July.

How did we get here? How have we managed to put up with this nonsense for so long? The rise of Botnets like Rustock, Grum, Lethic and Storm have made the problem more significant, and things are only going to get worse. We seem no closer to a solution to the spam problem than ever?

There has been much lambasting of Bill Gates since 2004 when he famously said that by 2006 “… spam will soon be a thing of the past.” Gates predicted that spam would be killed through the electronic equivalent of a stamp, and at the time various vendors were dabbling in similar standards-driven methods for authenticating genuine email and its sender. If only we understood then how important the botnet would become in the global spam problem.

The FUSSP

There is a concept in the anti-spam world called the FUSSP, an acronym for the Final Ultimate Solution to the Spam Problem; when you think have the FUSSP you may submit it to fussp.org and IETF, but there is a long list of criteria your FUSSP must fulfil – for example if your idea requires all SMTP gateways in the world to be the same or a replacement for SMTP, you have already failed.

Asking the world for the FUSSP is a great demonstration of crowd-sourcing a solution to a problem – but I can’t help but think that we’re missing an opportunity here.

A Coalition?

What if, we the collective email security vendors of the world unite to form an alliance against spam, viruses and phishing. We already have the knowledge, research and technology to do this but we choose to use it competitively rather than collaboratively. In a sense we would collectively BE the FUSSP.

This is a big problem that requires a big-thinking solution, bigger than each of us can imagine individually – if we could form this coalition we might be able to win this battle once and for all.

Then again, would a coalition be as agile as the dark forces driving the dark SMTP traffic business?
Or would it simply get so bogged down by bureaucratic red tape that it never managed to realise its goals?

As per usual the greater good comes in second place and the users of email systems suffer…

please comment and lets see what you think, I would like to see if anyone thinks this could work!

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Coca-Cola Australia ditching Lotus Notes and adopting Microsoft BPOS

by Justin Pirie August 27, 2010

Now it is not entirely surprising, that a Notes customer is switching to BPOS. It’s estimated that 90% of the circa 2 million users on BPOS were former Notes users. If you were thinking about migrating to Exchange from Notes, it basically makes no sense to go on-premise if you haven’t already got an investment in [...]

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Microsoft release Exchange 2010 Service Pack 1!

by Barry Gill August 26, 2010

The MS Exchange team released this announcement yesterday: – You have been eagerly waiting, and we have been working hard over the summer to deliver the latest Exchange Server 2010 enhancements as soon as possible. I am extremely happy to announce the availability of Exchange Server 2010 Service Pack 1, ready for download here. Too [...]

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[Video] What is the impact of reduced Disk I/O on Exchange 2010 Architecture design?

by Barry Gill August 24, 2010

There is a lot of talk about the performance improvements in Exchange 2010- in particular the reduction in Disk I/O. Is this real or imagined? What are the tradeoffs Microsoft has had to make in order to make this work? Join Exchange Expert and Mimecaster Barry Gill talk through some of the issues when looking [...]

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[Video] Exchange 2010 Architecture Design with Virtualization- Can I virtualize it all?

by Barry Gill August 24, 2010

in this video post, Justin and I talk a little about Microsoft Exchange 2010 and Virtualization and how architects need to make sure that assumptions they make are not going to catch them out in the end… Please comment- this is my first Video Blog and I welcome your feedback! Transcript Justin Pirie (JP): So [...]

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Cloud Recovery: RaaS is only half the answer

by Orlando Scott-Cowley August 18, 2010

Last week I was reading this article on Cloud Recovery, by our fellow cloud vendor Geminare’s CEO, Joshua Geist. The thrust of Joshua’s excellent writing is about the concept of Cloud Recovery, or as some are calling it; RaaS, Recovery as a Service. As Joshua quite rightly points out, the cloud makes a perfect platform [...]

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Can Microsoft beat Google at it’s own Game with the Azure Appliance?

by Justin Pirie August 17, 2010

Can Microsoft ever catch Google? That’s a question I’ve heard many times recently. Going to the Microsoft Worldwide Partner Conference in Washington helped me answer some of those nagging questions. One of the problems with a long time away travelling to conferences like I did in July is that there is hardly any time to really [...]

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Perspective: Are Customers today doing the right due diligence on the Cloud?

by James Blake August 11, 2010

Jay Heiser of Gartner makes some interesting points in his recent blog post -especially regarding the suitability of existing security standards and certifications to evaluate vendors utilising what is a fairly new and evolving delivery model. The work by Cloud Security Alliance and Cloud Audit are making good progress in delivering a set of recommended [...]

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Continuity: My Blackberry and other mobile devices

by Orlando Scott-Cowley August 10, 2010

RIM & their Blackberry handsets (other mobile devices are available) are having a hard time of it in some Middle-Eastern countries at the moment. As this blog and other outlets have reported, the encryption used to protect data in transit isn’t agreeable to the Governments of those States. Whilst this is alarming news for those [...]

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