Gmail and the bulk folder

Earlier this week Gmail announced they were providing reasons for why they delivered a particular mail to the bulk folder. I’m sure a lot of senders are rejoicing over the clear feedback. After all this is exactly what they’ve been asking for “tell us why you’re filtering our mail and we’ll fix it.”
I am not sure, however, that this is going to help the majority of senders seeing mail going to the bulk folder. On the Gmail support pages, they list a number of the explanations they’re be providing.

  • Phishing scams
  • Messages from an unconfirmed sender
  • Messages you sent to Spam
  • Similarity to suspicious messages
  • Administrator-set policies

Similarity to suspicious messages is a polite way of saying “this mail looks like spam.” Gmail does provide a few more details for this classification.

Gmail uses automated spam detection systems to analyze patterns and predict what types of messages are fraudulent or potentially harmful. Here are just a few of the things our system considers when marking a message as spam:

  • Content that’s usually associated with spam such as mature content and “get rich quick” schemes
  • Messages that falsely appear to be a “bounced message” response (a system-generated email that you might automatically get after sending a message that can’t be delivered such as a message sent to an invalid email address)
  • Messages sent from accounts or IP addresses that have sent other spam messages
  • Behavior of other Gmail users, such as many people reporting spam from a particular sender
  • Similarity to other spam or phishing messages based on a combination of things like subject matter, elements like spelling and formatting, and suspicious attachments
  • A difference between your Gmail language preference and the language used in the message

Hopefully this will help senders diagnose the reasons for bulk foldering at Gmail. Given how tight their filters have gotten over the last 6 months, it’s certainly something more and more of us have to deal with.

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Content, trigger words and subject lines

There’s been quite a bit of traffic on twitter this afternoon about a recent blog post by Hubspot identifying trigger words senders should avoid in an email subject line. A number of email experts are assuring the world that content doesn’t matter and are arguing on twitter and in the post comments that no one will block an email because those words are in the subject line.
As usually, I think everyone else is a little bit right and a little bit wrong.
The words and phrases posted by Hubspot are pulled out of the Spamassassin rule set. Using those words or exact phrases will cause a spam score to go up, sometimes by a little (0.5 points) and sometimes by a lot (3+ points). Most spamassassin installations consider anything with more than 5 points to be spam so a 3 point score for a subject line may cause mail to be filtered.
The folks who are outraged at the blog post, though, don’t seem to have read the article very closely. Hubspot doesn’t actually say that using trigger words will get mail blocked. What they say is a lot more reasonable than that.

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Delivery challenges increasing

Return Path published their most recent Global Deliverability report this morning. (Get the Report) This shows that inbox placement of mail has decreased 6% in the second half of 2011. This decrease is the largest decrease Return Path has seen in their years of doing this report.
To be honest, I’m not surprised at the decrease. Filters are getting more sophisticated. This means they’re not relying on simply IP reputation for inbox delivery any longer. IP reputation gets mail through the SMTP transaction, but after that mail is subject to content filters. Those content filters are getting a lot better at sorting out “wanted” from “unwanted” mail.
I’m also hearing a lot of anecdotal reports that bulk folder placements at a couple large ISPs increased in the first quarter of 2012. This is after the RP study was finished, and tells me increased bulk folder placement is more likely to be a trend and not a blip.
One of the other interesting things from the RP study is that the differences are not across all mail streams, but are concentrated in certain streams and they vary across different regions.

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Spamming ESPs: the followup

Campaign Monitor contacted me about yesterday’s post. The phrasing I picked out of the spammers AUP matched their AUP quite closely. In fact, if you plug the AUP into Google, Campaign Monitor comes up as one of the first hits.
It was not Campaign Monitor I was talking about. In fact, the ESP I received the mail from is not on the first 8 pages of Google hits for the phrases I posted.
A similar thing happened when I posted about Dell spamming me. Dell has multiple ESPs, and one of their ESPs contacted me directly in case they were the ones Dell was spamming through. It was no surprise to me that they weren’t the ESP involved.
This is what good ESPs do. Good ESPs monitor their reputation and monitor what people are saying about them. Good ESPs notice when people claim they’re being spammed and effectively reach out to the complainers so they can investigate the claim.
Good ESPs don’t just rely on the complaint numbers to take action. They keep an eye out on social networks to see who might be receiving mail they never asked for.

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