Technology Advisor Blog

Have you ever received SPAM email from yourself?

Posted by Ann Westerheim on 5/12/11 3:26 PM

This sounds like a funny question because who would ever send themself a spam email?  What you really received is a "spoofed" message.  It's actually easy to alter an email to change the "from" address to make it appear that it's coming from someone else.  Basically a forgery.  (This is one of the reasons that if you use a spam filter, you shouldn't necessarily safe list your own address.)

Typically, spoofed messages are an attempt to get ads and phishing exploits through spam filters.  You may see that the message is from a familiar sounding name, and then open a message you wouldn't ordinarily open. In a phishing message, someone pretending to be someone you do business with is actually trying to steal your secure information (account number, password, etc).

We typically advise clients to set up an SPF (Sender Policy Framework) record which is an email verification system that checks the true source of an email.  This is a code set up in your DNS records that tells the world what the legitimate sending server is for your domain, and mail servers will reject other mail.  Keep in mind that if you use an email marketing tool like Constant Contact, you'll also need to add this information to your record (or your legitimate emails will appear to be spoofed.).  This will help prevent your good name from being exploited in spoofed messages.

For any incoming mail, always use caution and know that the sender may not be who they say they are!

There's no such thing as 100% protection for any threats on line, but having an SPF record is another layer of defense thats worth a few moments to add to your aresenal.

Tags: eMail, spam, DNS, SPF record

DNS - What you don't know CAN hurt you!

Posted by Ann Westerheim on 5/2/11 10:32 AM

Twice in the past month we received panicked calls from clients - "Help! Our email stopped working and we can't get any emails!" It turns out in both cases, the problem was the result of someone making updates to a web site and making unintended changes to DNS. 

While it's not important for users to know what all the tech jargon means, its VERY important to never make changes that you don't understand.  DNS stands for Domain Name Service.  It's the database of addresses that make the Internet work.  If you type www.ekaru.com into a browser, it's the master directory that tells your computer what IP address to find us at ("A" record").  If you send an email to info@ekaru.com, then a different IP address is used to find us ("mx" record").  Your computer understands IP address, not names.

Your domain name registration establishes the legal ownership of your domain name.  You should double check that the registration is in the name of your company or an owner of the business, and not any other employee or outside consultant.

Your name servers tell the world where your IP addresses are stored, so people can find you when they look up your domain name.  The most common mistake we see, is that when people make changes to their website without understanding how DNS works they often change their name servers without realizing that the "mx" records will break and mail won't be delivered.  It's ok to change name servers, but you must then copy your custom DNS records from your old name servers.

As a general rule, NEVER make changes to DNS unless you 100% understand what you're doing.  If someone else is working on your web site, make sure they understand your DNS records before giving them access to your registration.

By the way, the tool we use to check DNS records (and highly recommend!) is www.dnsstuff.com.  It's the first place we look when we get a call from a customer who can't access their email when their Internet access is working fine.

Tags: DNS, web site, e-Mail

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