Deliverability, Return Path, List-Unsubscribe Header

Here are a few blog posts covering the email industry from Constant Contact, Return Path, and SpamResource.
Constant Contact posted a blog post about how they measure email deliverability on January 10th.  They started with just tracking bounce backs and using that metric to calculate deliverability but then moved to using seed list through a third-party and report that they get 97% deliverability.  Read more at Constant Contact
On January 6th, Return Path recapped their most read blog posts which includes covering Yahoo’s DMARC Reject Policy, Blacklist Basics, and GMails new FBL and Unsubscribe button. Read more at Return Path
Return Path and SpamResource both have an excellent write-ups about the preference change at Outlook.com/Hotmail regarding the List-Unsubscribe header.  Microsoft, like Google, prefers to use mailto instead of http or other URI protocols for the List-Unsubscribe header.
 

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E-Postage Just Won't Die

E-Postage is back! Wired covers a report from New Scientist. Here’s what they have to say: “Yahoo’s researchers want you to voluntarily slap a one-cent stamp on your outgoing e-mails, with proceeds going to charity, in a bid to cut down on spam. Can doing good really do away with spam, which consumes 33 terawatt hours of electricity every year, not to mention way too much of our time?”
Alex Rubin at Return Path says hold up, wait a minute. He writes: “Our contacts at Yahoo! tell us this idea is purely in the research realm, and is not scheduled for development in Yahoo! Mail. In other words: it isn’t even vaporware and isn’t likely to be a part of the Yahoo! mail system anytime soon.” He goes on to say (I’m paraphrasing) that oops, Yahoo didn’t really intend for this research to become public.
So, apparently, there are no plans for Yahoo to roll out E-Postage today, tomorrow or next week. Nothing to see here, beyond a simple web site and some thoughts from a Yahoo researcher. Some individual’s hopeful vision for the future, not a corporate announcement of an upcoming product.
E-Postage has always been a neat idea, I’ve thought. A neat idea beset by insurmountable problems. First, end users don’t want to pay for the email messages they send, they want all you can eat. With years of webmail providers offering free email access, you’ll have a heck of a time convincing somebody’s grandmother that they have to pony up a nickel to be able to email the grandkids.
Then, answer me this: Who’s going to handle the economics on the back-end? And any time you have a computer storing a resource (like, say, account information for that tiny little bit of money you’ll need to be able to send me an email), that information can be hacked, exploited, stolen. You think spammers are actually going to pony up? Why would they? They’ll just hack into millions of exploitable computers, stealing five cents from everyone along the way, and gleefully shoveling millions of spams into millions of inboxes.
This concept of E-Postage, either paying money to send email, or spending “computational power” to send email, has been kicking around for years. Periodically, some researcher comes up with the idea anew, and suggests that we all immediately adopt their sure fire plan to solve the world’s spam problem, immediately, pennies at a time. These ideas never seem to go anywhere. And that will never change until somebody can actually convince most of the world to adopt their proposed scheme. Will it ever happen? Never say never, but I have no plans to rush out and buy e-Stamps any time soon.
— Al Iverson

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20% of email doesn't make it to the inbox

Return Path released their global delivery report for the second half of 2009. To put together the report, they look at mail delivery to the Mailbox Monitor accounts at 131 different ISPs for 600,000+ sends. In the US, 20% of the email sent by Mailbox Monitor customers to Return Path seed accounts doesn’t make it to the inbox. In fact, 16% of the email just disappears.
I’ve blogged in the past about previous Return Path deliverability studies. The recommendations and comments in those previous posts still apply. Senders must pay attention to engagement, permission, complaints and other policy issues. But none of those things really explain why email is missing.
Why is so much mail disappearing? It doesn’t match with the philosophy of the ISPs. Most ISPs do their best to deliver email that they accept and I don’t really expect that ISPs are starting to hard block so many Return Path customers in the middle of a send. The real clue came looking at the Yahoo numbers. Yahoo is one of those ISPs that does not delete mail they have accepted, but does slow down senders. Other ISPs are following Yahoo’s lead and using temporary failures as a way to regulate and limit email sent by senders with poor to inadequate reputations. They aren’t blocking the senders outright, but they are issuing lots of 4xx “come back later” messages.
What is supposed to happen when an ISP issues a 4xx message during the SMTP transaction is that email should be queued and retried. Modern bulk MTAs (MessageSystems, Port25, Strongmail) allow senders to fine tune bounce handling, and designate how many times an email is retried, even allowing no retries on a temporary failure.
What if the missing mail is a result of senders aggressively handling 4xx messages? Some of the companies I’ve consulted for delete email addresses from mailing lists after 2 or 3 4xx responses. Other companies only retry for 12 – 24 hours and then the email is treated as hard bounced.
Return Path is reporting this as a delivery failure, and the tone of discussion I’m seeing seems to be blaming ISPs for overly aggressive spamfiltering. I don’t really think it’s entirely an ISP problem, though. I think it is indicative of poor practices on the part of senders. Not just the obvious permission and engagement issues that many senders deal with, but also poor policy on handling bounces. Perhaps the policy is fine, but the implementation doesn’t reflect the stated policy. Maybe they’re relying on defaults from their MTA vendor.
In any case, this is yet another example of how senders are in control of their delivery problems. Better bounce handling for temporary failures would lower the amount of email that never makes it to the ISP. This isn’t sufficient for 100% inbox placement, but if the email is never handed off to the ISP it is impossible for that email to make it to the inbox.

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FBLs, complaints and unsubscribes

On one of my mailing lists there was a long discussion about the Q Interactive survey. Some of the senders on the list were complaining that unless ISPs provide FBLs they should not use complaints to make filtering decisions. The sender perspective is that it isn’t fair for the ISPs to have data and use it without sharing it back so that the senders could remove complainers.
This deeply, deeply misses the point.
The ISPs are in the business of keeping their users happy. Part of that is measuring how users react to mail. This includes providing “report spam” or similar buttons when they control the interface. Some ISPs have chosen to share that data back with senders. Some ISPs have made the choice not to share that information back.
But even the ISPs that share FBL data with senders do not expect that the only thing a sender will do is remove the email address. ISPs expect senders to actually pay attention, to not send mail that their recipients do not want. They expect that ESPs are going to notice that one customer has consistently high complaint rates and actually force their customer to stop sending mail that recipients think is spam.
Senders should keep track of complaint rates. Measure them per send. Do not waste time whining that this ISP or that ISP will not set you up with a FBL. Take the data from those ISPs that do have FBLs and measure it. It is extremely unlikely that a mailing will have grossly different complaint rates between ISPs. You have all the data you need in order to evaluate how your recipients are perceiving your email.
ESPs and senders who think that their only response to FBL complaints should be to remove that email are the ones most likely to have filtering and blocking problems. The ISPs are giving them valuable data that they can use to evaluate how their emails are being received. Instead of being ungrateful, wagging fingers and blaming the ISPs for not giving them the data they want, senders should spend more time focusing on what they can discover from the data that is shared with them.
A FBL email is more than an unsubscribe request, senders should stop focusing on the unsubscribe portion of the FBL process and focus more on the recipient feedback portion of it. What can you learn about your mail from a FBL?

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