To the unfamiliar, the ‘Reverse Lookup’ might sound like something you’d see in one of Tom Daley’s diving routines.
However in email and DNS terms, it’s an essential security check which can dramatically reduce the amount of spam you’re seeing. It’s also one of those many tricky DNS areas that causes confusion so I hope this post will help demystify it a little.
With the recent Panda Antivirus signature problem still fresh in my mind, and as a fair few of our support calls continue to be antivirus related, I thought you might find it useful if I share some of the antivirus issues we see regularly tripping customers up.
Of course every software vendor professes their product incorporates the latest and greatest protection technology. When you’re working out what to use as a Systems Administrator however, it’s also important to think beyond that and specifically about how your proposed solution will interact with other applications in your network environment.
These are a handful of the areas we find usually end up resulting in a support call.
Cyren’s quarterly Internet Threat Trends reports are a MUST READ for IT professionals and MSP’s alike and this one is no exception.
You could be forgiven for not recognising the Cyren name as they’ve recently rebranded from Commtouch, however Cyren are a huge player in the world of Internet security and provide the technology used by industry giants such as Google, Microsoft, Intel and T-Mobile.
Their real-time threat protection and antivirus engine also powers both MDaemon Messaging Server and SecurityGateway for Exchange.
Alt-N Technologies, BackupAssist, MailStore….they were all there. And that’s not all, we were even fortunate enough to bag a couple of inspirational guest
Yes, just in case you’ve missed us shouting about it every five minutes, last month was our “PartnerMeet” event in Canary Wharf. As you’ve probably gathered, we don’t do these that often (as often as we should!) and we were thrilled with the way it went, not least because of the great presentations made by the speakers we’d lined up for the day.
If you weren’t able to make it along then a) forever hold your head in shame and b) do not fear, we planned for this and took the liberty of booking a film crew to capture the lot.
Enjoy footage in glorious HD of each and every presentation on the day….
Today’s nugget of MDaemon wisdom comes from conversations I’ve had with a small number of customers reporting they’re unable to send outbound email to specific recipients.
Upon closer inspection of the error in the SMTP (OUT) log, there’s a message reading “SSL negotiation failed“.
October, as you’ll probably know, is the unofficial ‘silly season’ for IT gatherings in the UK.
It’s around this time each year, vendors, exhibition companies and industry bodies go all out competing for the attention of the IT support companies and MSP’s they’d like at their events.
If you have ever suspected that a slow performing server is down to slow access to a hard drive you may have started searching the web for a tool to help diagnose the root of the problem.
What you might not know is that Windows has a very handy built-in tool for doing just that and can provide some excellent real-time statistics.
As with a lot of new technologies the real power comes from when they are used by the masses.
Sender Policy Framework or SPF is no longer a new technology and is generally widely used to help preserve email domain reputation for large organisations, but it’s as well-known about in the Small to Medium sized business end of the email market.
Spammers know this and have started to target domains that do not have valid SPF records as they can most easily be used to spoof and send spam claiming to be from valid companies. Often these types of spoofed email are used in phishing attacks to then harvest more valuable data, so the smaller companies that can adopt the use of SPF the better.
A long time ago in a galaxy far away….well….ok, just a long time ago, I learnt that in order to diagnose the email delivery problems of our customers, understanding the role of DNS would be absolutely fundamental.
Not only that, but I quickly realised the value of the ‘NSlookup’ DNS tool which is included within Windows.
Independent analyst and security director for EncSec, Graeme Batsman has appeared in, and advised, publications including SC Magazine, The Independent, Microsoft, Metro, Experian and many more.
Graeme had recently been testing a number of email security products including those from vendors such as Barracuda and Sophos when we contacted him about ‘hot off the press’ SecurityGateway version 3.0.