Domains need to be warmed, too

One thing that came out of the ISP session at M3AAWG is that domains need to be warmed up, too. I can’t remember exactly which ISP rep said it, but there was general nodding across the panel when this was said.
This isn’t just the domain in the reverse DNS of the sending IP, but also domains used in the Return Path (Envelope From) and visible from.
From the ISP’s perspective, this makes tons of sense. Some of the most prolific snowshoe spammers use new domains and new IPs for every send. They’re not trying to establish a reputation, rather they’re trying to avoid one. ISPs respond by distrusting any mail from a new IP with a new domain.

People are your weakest link
Sendgrid's open letter to Gmail

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Return Path published their most recent Global Deliverability report this morning. (Get the Report) This shows that inbox placement of mail has decreased 6% in the second half of 2011. This decrease is the largest decrease Return Path has seen in their years of doing this report.
To be honest, I’m not surprised at the decrease. Filters are getting more sophisticated. This means they’re not relying on simply IP reputation for inbox delivery any longer. IP reputation gets mail through the SMTP transaction, but after that mail is subject to content filters. Those content filters are getting a lot better at sorting out “wanted” from “unwanted” mail.
I’m also hearing a lot of anecdotal reports that bulk folder placements at a couple large ISPs increased in the first quarter of 2012. This is after the RP study was finished, and tells me increased bulk folder placement is more likely to be a trend and not a blip.
One of the other interesting things from the RP study is that the differences are not across all mail streams, but are concentrated in certain streams and they vary across different regions.

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This summer Yahoo shook up the email ecosystem by publicly announcing they were recycling usernames. The shakeup wasn’t so much that they were recycling usernames, but that they did it in a way that compromised user information and account security. Any user that had an account tied to a recycled Yahoo account is at risk for having their PII leaked. Folks are still dealing with the fallout, both Yahoo and the companies who are trying to meet customer needs by sending emails and protect customer emails by not sending emails.
On top of that, Yahoo announced they’re selling off a number of domains that they’ve accumulated over the years. Some of these are pretty high value domains like webserver.com, sandwich.com and other real words.
I don’t think Yahoo used any of these domains for email, and even if they did any addresses should have bounced off years ago. Still, it does bring up some broader policy issues.
Many, many things online, from bank accounts to social media accounts to blog commenting systems treat email addresses as a unique identifier for that account. Many of these databases were developed with the underlying assumption that people wouldn’t change their email addresses and that it was a static value. This wasn’t a true assumption 10 years ago and it’s certainly not true now. This mistaken assumption is a problem, and one that more and more companies are going to have to address moving forward. This isn’t about email and it isn’t about delivery, it’s about simple data accuracy and hygiene.
Companies must start thinking and addressing email address impermanence. These issues are not going away.

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