Thoughts on Hotmail filtering

One of the new bits of information to come out of the EEC15 deliverability discussions is how Hotmail is looking at engagement differently than other webmail providers.
Many webmail providers really do look at overall engagement with a mail when making delivery decisions. And this really impacts new subscribers the most. If there is a mailing where a lot of subscribers are engaged, then new subscribers will see the mail in their inbox. Based on what was said at the webinar earlier this week engagement has no effect at Hotmail outside of the individual user’s box.
I’ve certainly seen this with clients who’ve tried trimming subscriber lists but that doesn’t really help get mail moved from the Hotmail bulk folder to the inbox.
 
Instead of subscriber lists, Hotmail is really looking at bounces. They’re watching the number of nonexistent accounts senders are mailing to and they’re counting and a sender hits too many bad addresses and that is a major hit to their reputation.
All of this makes remediation at Hotmail challenging. Right now, we can remediate a bad reputation at a lot of ISPs and the filters catch up and mail starts flowing back to the inbox. Hotmail has set up a system that they say is “hard for spammers to game.” This seems to translate into hard for legitimate senders to fix their reputation.
Hotmail is, IMO, the current tough nut in terms of deliverability. Develop a bad reputation there and it’s difficult to fix it. I’m sure it’s possible, though.

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This morning I got up to a number of people complaining that logins were failing on the website and the API was down. I contacted the person behind SNDS and they confirmed there was a problem and they were fixing it.
Sometime this afternoon it was possible to login to the SNDS interface again, so it looks like they did fix it.
A bit of a warning, though, don’t expect to see any of the data from the last few days. There seems to be something with SNDS that means that when the service is down data isn’t collected or available. In the past when there have been problems, older data was not populated when the service came back.

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Hotmail fights greymail

I’ve heard a lot of marketers complaining about people like me who advocate actually purging addresses from marketing lists if those addresses are non-responsive over a long period of time. They have any number of reasons this advice is poor. Some of them can even demonstrate that they get significant revenue from mailing folks who haven’t opened an email in years.
They also point out that there isn’t a clear delivery hit to leaving those abandoned addresses on their list. It’s not like bounces or complaints. There isn’t a clear way to measure the dead addresses and even if you could there aren’t clear threshold guidelines published by the ISPs.
Nevertheless, I am seeing more and more data that convinces me the ISPs do care about companies sending mail that users never open or never read or never do anything with.
The most recent confirmation was the announcement that Hotmail was deploying more tools to help users manage “greymail.” I briefly mentioned the announcement last week. Hotmail has their own blog post up about the changes.
It seems my initial claim that these changes this won’t affect delivery may have been premature. In fact, these changes are all about making it easier for Hotmail users to deal with the onslaught of legitimate but unwanted mail.

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Tweets from engagement and deliverability webinar

Want to see some of the tweets shared during the EEC Deliverability and Engagement webinar on March 17? Check out what was said as it happened.

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