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Barracuda clicking all links in emails
A number of people have asked me recently if I know anything about appliances clicking all the links in emails. Some of those people have asked specifically about Barracuda, some have just asked if I knew of any filters that clicked links.
The answer is, yes, there are cases where spam filters have followed all the links in an email. One of the filters that I know has done this in the past is Barracuda. Based on discussions with the different people who are reporting this behavior, it does seem that this is happening more often. One person did mention that they were primarily seeing this with mail where the click domains were different from the From: domains.
I’m still working on getting more information from folks, and will update if I hear anything more. I’m also working on some advice for folks who get caught in this.
If you have experience with Barracuda (or other spam filters) clicking all the links in an email, drop me an email (contact)
Links: September 24, 2012
Last week Return Path announce a new set of email intelligence products. One of their new products offers customers the chance to actually see how (some subset of) their customer base interacts with mail directly. It moves beyond simply looking at probe mailboxes and actually looks inside the mailbox of recipients.
Spamhaus has listed bit.ly on the Domain Blocklist (DBL) for allowing spammers to abuse their redirector service. Spammers have been abusing bit.ly for a while, and I’m a little surprised it’s taken so long for a listing to happen. Steve wrote a post last year about URL redirectors and offered suggestions on what to do to avoid blocking problems when using a URL shortening service.
Real Insights has a very interesting post on why it should be “hard” to subscribe to your mailing list. There are also a number of good suggestions about the subscription process itself. Definitely worth a read.
Barracuda filters clicking all links
Earlier this month I mentioned that a number of people were seeing issues with multiple links in emails being clicked by Barracuda filters. I invited readers to contact me and provide me with any information or evidence they had. Not only did a number of senders contact me, but one of the support reps at Barracuda also contacted me.
At issue is a part of the Barracuda email filter call the intent filter. There are 3 different modules to this filter.