Changes at Gmail

As I’ve said before, I can usually tell when some ISP changes their filtering algorithm because I start getting tons and tons of calls about delivery problems at that ISP. This past month it’s been Gmail.
There have been two symptoms I’ve been hearing about. One is an increase in bulk folder delivery for mail that previously was reliably hitting the inbox. The other is a bit more interesting. I’ve heard of 3 different mailers, with good reputations and very clean lists, that are seeing 4xx delays on some of their mail. The only consistency I, and my colleagues at some ESPs, have identified is that the mail is “bursty.”
The senders affected by this do send out mail daily, but the daily mail is primarily order confirmations or receipts or other transactional mails. They send bi-weekly newsletters, though, exploding their volume from a few tens of thousands up to hundreds of thousands. This seems to trigger Gmail to defer mail. It does get delivered eventually. It’s frustrating to try and deal with because neither side is really doing anything wrong, but good senders are seeing delivery delays.
For the bulk foldering, Bronto has a good blog post talking about the changes and offering some solid suggestions for how to deal with them. I’m also hearing from some folks who are reliable that Gmail may be rolling back some of the bulk foldering changes based on feedback from their users.
So if you’re seeing changes at Gmail, it’s not just you.

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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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The blog post ends with a question:

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