Spamfilters: a marketer's best friend

I was cleaning out my spam folder this afternoon. I try and do it at least once a day, otherwise the volume gets so bad I don’t actually look at the mail I just mark it all as read. I realized, though, that spamfilters are actually a marketer’s best friend.
If there were no spam filters keeping all the crap people get out of their inbox (in my case over 1000 messages a day) then spam would overwhelm even the most dedicated email junkie. I couldn’t do my job without my spam filters, and in fact the recent rash of virus spew is ending up in my inbox and making finding real mail a problem. I do a lot of sorting before mail ever hits my inbox, and I’m still struggling to deal with the couple hundred “your order has shipped!” and “please her tonight!” emails that my local bayesian filters haven’t caught up to, yet.
Today’s stats:
Work inbox: 17 messages
Work spam: 419
95.9% spam
Personal inbox: 40
Personal spam: 975
95.9% spam
Without filters, I couldn’t accurately find that 4.1% of real mail that I get. Without filters, I couldn’t do my job. Without filters, I couldn’t find the real receipts from purchases I actually made. Without filters, I couldn’t read and respond to mail I wanted.
A mailbox overflowing with spam is unuseable, and email marketers should be thankful that providers work so hard to keep spam out. Otherwise, email wouldn’t be useful for anything.

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Email is not direct mail

Had an interesting talk with a colleague at a BBQ this weekend. He was at a large ISP and then moved on to do delivery at a large email marketing company. This marketing company was started by a very successful direct (snail mail) marketer. The CEO believed totally in testing and they measured everything. They knew what colors provoked a better response and which fonts were better received by recipients.
But this wasn’t always enough. They had some spotty delivery and my friend was hired to try and solve the delivery problems. He had some luck and did fix a number of things, but there was a deeper issue he couldn’t address: that email is not direct mail. The types of testing done is the type of testing for direct mail. They were so focused on getting the best response to a particular offer they refused to consider tweaking an offer from their “proven ideal” to stop triggering content filters at some large ISPs. So their ideal offers would sometimes end up in the inbox and sometimes in the bulk folder and sometimes just disappear.
With direct mail, the USPS is required by law to deliver mail to the addressee. Not only that there are a lot of barriers put up to prevent (or discourage) recipients to opt-out of receiving direct mail. This isn’t the case in email. Not only is their no requirement for an ISP to deliver email to recipients, there is actually a law that says that recipients must be able to opt-out from receiving future emails.
Direct marketers are used to having a lot of freedom and control over their mail. They can buy and sell address lists and send almost anything they want without having anyone tell them they can’t. That mindset translates badly into the email space where the ISPs and the recipients have a lot of control over their incoming email. It means that senders with the absolute perfect test copy see delivery problems because their perfect copy looks just like something a spammer would do and gets caught in content filters. It means they come into email and try to buy a list and discover that while it may be financially viable, they have to deal with angry upstreams, blocks at recipient ISPs and sometimes a Spamhaus listing.
Email isn’t the same as direct mail and attempting to map direct mail techniques onto email usually doesn’t work.

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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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Appendleads is not unusual

I called out David Williams from appendleads.com yesterday for his spam. Sure he’s a spammer, his database is full of garbage information and his email violates CAN SPAM but he’s not that unusual in the realm of list sellers. He is very typical of the people I see offering lists for sale.
List sellers are the internet version of used car salesmen. Everyone knows they are slimy sales guys who will do anything to close the sale. They don’t have a real web presence, just visit appendleads.com and see what I mean.
And yet, people still buy lists from them! I have no doubt that my spammer friend has a nice little business selling email addresses. He sends out spam, he gets a few responses, makes a tidy profit and then sends out another spam, hooks a few more people and makes more money.
OK, so not all list sellers are like appendleads. Some of them go so far to build a website. But at the core they’re the same. They are selling data that isn’t clean, it’s not opt-in, it’s not been verified.
This is why so many of us harp on not buying lists. The sales guys talk a great game, but they aren’t selling what purchasers think they’re getting. They also don’t care. They have no incentive to clean up their data. They have no incentive to accurately represent what they’re selling. All of the risk is on the person that sends the email. Once they have their money, the buyer is on their own.
Can you ever successfully purchase a list? I’m sure some senders have. But that experience is closer to winning more than a thousand dollars in the lottery than an actual good business decision.

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