Spammers quite often ‘spoof’, or fake, the from address of an email.
As a result of this, many unsuspecting domain owners are being ‘blamed’ for spam that appears to come from their domain.
Fortunately, there is a relatively easy way to protect your domain from this: Publish DMARC policies.
If you are publishing SPF records and signing your email with DKIM, you can publish DMARC policies that tell receiving mail servers what do with emails that don’t align with the SPF and DKIM information.
SPF policies are DNS records that indicate what mail servers your mail is sent from.
DKIM is a way to add digital signatures to your email so that receiving mail servers can verify it was sent from an authorized source and that it wasn’t modified in transit.
Now what if you have a domain that you NEVER send email from?
Protecting those domains from being used in spam is even easier.
Well, our good friends at Yahoo are at it again.
Once again they are deferring mail for no apparent reason.
Nothing has changed on my system and yet they haven’t accepted a message to deliver to one of their users in 3 days (maybe more). And, of course, there’s no way to actually contact a human to find out what is going wrong.
I’m on Yahoo’s email feedback loop … so I’m notified when someone complains about a message. Nothing has come in recently from the feedback loop.
I used to be on their bulk sender white-list. There was never a mention of having to renew the white-list approval.
A note to all my friends … DO NOT USE YAHOO FOR EMAIL! Especially for business email. The folks at Yahoo do NOT know how to provide service.
Gmail doesn’t have this problem … nor does Hotmail (much as I love to hate Microsoft).
Oh, and FWIW, yahoo customer service tends to ignore questions that are too complex for their script reading drones to answer.
Most ISP’s and network providers have specific email addresses that you can report abuse to.
These addresses can be looked up using a whois tool.
Recently, I’ve noticed a number of those addresses that just don’t work the way they are supposed to.
I’ve always suspected this about the legal disclaimers that are becoming ubiquitous at the bottom (and sometimes top) of email messages from companies that employ attorneys …
… they are mostly, legally speaking, pointless. Lawyers and experts on internet policy say no court case has ever turned on the presence or absence of such an automatic e-mail footer in America, the most litigious of rich countries.
I kind of find it amusing when there is a disclaimer that reads …
This message contains confidential information and is intended only for the individual named.
… and it’s sent to a public mailing list.
By now everyone’s probably heard about the data breach at Epsilon … which resulted in a lot of major eCommerce vendors customers mailing list getting stolen.
Personally, I’ve gotten notifications from Chase, Walgreen, Tivo, Best Buy, 1-800-Flowers, and a few others … informing me of the breach and assuring me that no critical information was stolen … just my email address.
What do you do now?
I’ve noticed an interesting trend in the comment spam I’ve been getting (luckily few of it gets through).
There seems to be three basic categories …
A few days ago I discovered that Yahoo had created a email abuse feedback loop system.
Based on my experiences with AOL’s feedback system, I really didn’t have high hopes for Yahoo’s efforts … but decided to give it a shot anyways.
I signed up to get abuse reports for midrange.com messages. It took a bit of time to get it all processed, but it’s now in place.
The next day I got my first report of abuse.