Feedback loops

There are a lot of different perspectives on Feedback Loops (FBLs) and “this is spam” buttons across the email industry.
Some people think FBLs are the best thing since sliced bread and can’t figure out why more ISPs don’t offer them. These people use use the data to clean addresses off their lists, lower complaints and send better mail. They use the complaints as a data source to help them send mail their recipients want. Too many recipients opted out on a particular offer? Clearly there is a problem with the offer or the segmentation or something.
Other people, though, think the existence of “this is spam” buttons and FBLs is horrible.  They call people who click “this is spam” terrorists or anti-commerce-net-nazis. They want to be able to dispute every click of the button. They think that too many ISPs offer this is spam buttons and too many ESPs and network providers pay way to much attention to complaints. The argue ISPs should remove these buttons and stop paying attention to what recipients think.
Sadly, I’m not actually making up the terminology in the last paragraph. There really are who think that the problem isn’t with the mail that they’re sending but that the recipients can actually express an opinion about it and the ISPs listen to those opinions. “Terrorists” and “Nazis” are the least of the things they have called people who complain about their mail.
One of the senior engineers at Cloudmark recently posted an article talking about FBLs and “this is spam” buttons. I think it’s a useful article to read as it explains what value FBLs play in helping spam filters become more accurate.

We have found over time that the most effective systems are those that learn to classify undesirable content based on feedback from users. The user is truly the best judge of what is and isn’t spam. The faster that consistent feedback becomes available, the sooner a filter can be re-trained to detect and respond to new attacks.

Spam filters are not there to stymie senders, their real job is to protect recipients. Faster adapting filters may seem like a bad thing, but they adapt in both directions. Send good mail that people want and it gets through. Send bad mail that people complain about and filters quickly adapt to block it.

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Change is required

I get a lot of calls from senders who tell me that they have not changed what they were doing, but all of a sudden their mail isn’t performing the way it used to. Sometimes it’s simply less effective marketing, but more often than not the issue is mail being blocked or filtered to the bulk folder.
What worked today won’t work tomorrow. Spammers are forever evolving new techniques to get past spam filters. ISPs are forever evolving new techniques to stop them.
One of the current driving forces for spam filter development is focused on the individual recipients. Recipient wants and needs are king in the world of ISP mail filtering. Much of that is driven by the underlying business models of the free ISPs. They are selling eyeballs to their advertisers and that relies on keeping as many eyeballs around for as long as possible.
An early version of the recipient driven filtering was “add to your address book” where individual users could over ride ISP delivery decisions by actively adding a From: address to their address book. The ISPs have been refining this over time. For instance, if you reply to an email in some clients, you are prompted to add that address to your address books. If you take an email out of your bulk folder and move it to your inbox then that address is automatically added to your address book.
But the refinements haven’t stopped there. ISPs are now making smart decisions about what emails a particular recipient will want to receive. This raises a number of challenges to senders. How do you send email to ten thousand or a hundred thousand or a million people and make it relevant to all of them?
Smart senders will take the individual delivery challenge in stride. They will change along with the ISPs, to send mail that their recipients want to receive. Change is inevitable and required.

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Why do ISPs do that?

One of the most common things I hear is “but why does the ISP do it that way?” The generic answer for that question is: because it works for them and meets their needs. Anyone designing a mail system has to implement some sort of spam filtering and will have to accept the potential for lost mail. Even the those recipients who runs no software filtering may lose mail. Their spamfilter is the delete key and sometimes they’ll delete a real mail.
Every mailserver admin, whether managing a MTA for a corporation, an ISP or themselves inevitably looks at the question of false positives and false negatives. Some are more sensitive to false negatives and would rather block real mail than have to wade through a mailbox full of spam. Others are more sensitive to false positives and would rather deal with unfiltered spam than risk losing mail.
At the ISPs, many of these decisions aren’t made by one person, but the decisions are driven by the business philosophy, requirements and technology. The different consumer ISPs have different philosophies and these show in their spamfiltering.
Gmail, for instance, has a lot of faith in their ability to sort, classify and rank text. This is, after all, what Google does. Therefore, they accept most of the email delivered to Gmail users and then sort after the fact. This fits their technology, their available resources and their business philosophy. They leave as much filtering at the enduser level as they can.
Yahoo, on the other hand, chooses to filter mail at the MTA. While their spamfoldering algorithms are good, they don’t want to waste CPU and filtering effort on mail that they think may be spam. So, they choose to block heavily at the edge, going so far as to rate limit senders that they don’t know about the mail. Endusers are protected from malicious mail and senders have the ability to retry mail until it is accepted.
The same types of entries could be written about Hotmail or AOL. They could even be written about the various spam filter vendors and blocklists. Every company has their own way of doing things and their way reflects their underlying business philosophy.

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Is your mail being bulk foldered?

Daisy at Signup.to posted a list of 11 things to do when mail is going to the bulk folder. Her suggestions are a good start to troubleshooting and fixing persistent bulk foldering of mail.
One thing she doesn’t mention is that while bulk foldering can sometimes be the result of poor content, more often it’s the result of unengaged recipients. Think of bulk foldering this way: the ISP has some subscribers they’re pretty sure want your mail, so they’re not going to block your mail. But they’re pretty sure a lot of subscribers don’t want your mail so they’re not going to deliver it to the inbox.
The trick to getting mail moved out of the bulk folder is to get more people engaged with your email marketing. This is tough to do if they’re not actively checking their bulk folder for mail but there are some ways I’ve helped clients get mail into the inbox.

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