How long does it take to change reputation at Gmail?

Today I was chatting with a potential client who is in the middle of a frustrating warmup at Gmail. They’re doing absolutely the right things, it’s just taking longer than anyone wants. That’s kinda how it is with Gmail, while their algorithm can adapt quickly to changes. Sometimes, like when you’re warming up or trying to change a bad reputation, it can take 3 – 4 weeks to see any direct progress.This is a screenshot of IP reputation on Google Postmaster Tools. The sender made some significant changes in mail sending on some of their IP addresses starting in mid to late December. You can see, that the tools noticed and the reputation of those IPs bad to good fairly rapidly. It took a few more weeks of consistent sending for those two IPs to switch to yellow. And it took around another month for the reputation to flip to high.
Because this company is doing all the right things, and they’re seeing (as they describe it) some small amounts of improvement, I told them to give it another couple weeks. If they weren’t happy with their progress I could help them. But, frankly, until we can tell if this is something other than a normal warmup there isn’t much else to do.
When I got off the phone I felt very much like a doctor telling a patient to take two aspirin and call me in the morning. But, honestly, sometimes that is the right answer. Give it time.

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Filtering by gestalt

One of those $5.00 words I learned in the lab was gestalt. We were studying fetal alcohol syndrome (FAS) and, at the time, there were no consistent measurements or numbers that would drive a diagnosis of FAS. Diagnosis was by gestalt – that is by the patient looking like someone who had FAS.
It’s a funny word to say, it’s a funny word to hear. But it’s a useful term to describe the future of spam filtering. And I think we need to get used to thinking about filtering acting on more than just the individual parts of an email.

Filtering is not just IP reputation or domain reputation. It’s about the whole message. It’s mail from this IP with this authentication containing these URLs.  Earlier this year, I wrote an article about Gmail filtering. The quote demonstrates the sum of the parts, but I didn’t really call it out at the time.

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Google makes connections

One of the client projects I’m working on includes doing a lot of research on MXs, including some classification work. Part of the work involves identifying the company running the MX. Many of the times this is obvious; mail.protection.outlook.com is office365, for instance.

There are other cases where the connection between the MX and the host company is not as obvious. That’s where google comes into play. Take the domain canit.ca, it’s a MX for quite a few domains in this data set. Step one is to visit the website, but there’s no website there. Step 2 is drop the domain into google, who tells me it’s Roaring Penguin software.
In some cases, though, the domain wasn’t as obvious as the Roaring Penguin link. In those cases, Google would present me with seemingly irrelevant hosting pages. It didn’t make sense until I started digging through hosting documentation. Inevitably, whenever Google gave me results that didn’t make sense, they were right. The links were often buried in knowledge base pages telling users how to configure their setup and mentioning the domain I was searching for.
The interesting piece was that often it was the top level domain, not the support pages, that Google presented to me. I had to go find the actual pages. Based on that bit of research, it appears that Google has a comprehensive map of what domains are related to each other.
This is something we see in their handling of email as well. Gmail regularly makes connections between domains that senders don’t expect. I’ve been speaking for a while about how Gmail does this, based on observation of filtering behavior. Working through multiple searches looking at domain names was the first time I saw evidence of the connections I suspected. Gmail is able to connect seemingly disparate hostnames and relate them to one another.
For senders, it means that using different domains in an attempt to isolate different mainstreams doesn’t work. Gmail understands that domainA in acquisition mail is also the same as domainB in opt-in mail is the same as domainC in transactional mail. Companies can develop a reputation at Google which affects all email, not just a particular mail stream. This makes it harder for senders to compartmentalize their sends and requires compliance throughout the organization.
Acquisition programs do hurt all mail programs, at least at Gmail.
 

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Warmup advice for Gmail

Getting to the Gmail inbox in concept is simple: send mail people want to receive. For a well established mail program with warm IPs and domains, getting to the inbox in practice is simple. Gmail uses recipient interaction with email to determine if an email is wanted or not. These interactions are easy when mail is delivered to the inbox, even if the user has tabs enabled.
When mail is in the bulk folder, even if it’s wanted, users are less likely to interact with the mail. Senders trying to change their reputation to get back to the inbox face an uphill battle. This doesn’t mean it’s impossible to get out of the bulk folder at Gmail, it’s absolutely possible. I have many clients who followed my advice and did it. Some of these clients were simply warming up new IPs and domains and needed to establish a reputation. Others were trying to repair a reputation. In both cases, the fixes are similar.

When I asked colleagues how they handled warmup at Gmail their answers were surprisingly similar to one another. They’re also very consistent with what I’ve seen work for clients.

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