A bunch of folks today mentioned they were seeing poor reputation for formerly good reputations on Google Postmaster Tools. I’m seeing a lot of screen shots that look like this one.
It looks like something is going on over there that has nothing to do with actual reputation. Could be a reporting bug, could be a filtering problem. I’m not seeing people mention delivery problems, just that the reputation monitor is showing bad reputation.
A code glitch in a new DBL sub-zone known as 'Abused-Legit' caused the new Abused-Legit zone to list ".net." for 60 minutes from 08:35 UTC.
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M3AAWG has published a new version of the Senders Best Common Practices document and the contains a lot of new information since the original publication in 2008. The new document covers how to vet ESP customers, considerations when selecting a dedicated or share IP to send mail, and includes best practices on a number of technical processes.
The Senders Best Common Practices document is targeted at deliverability teams and email marketers. Any company that is sending marketing emails, using an Email Service Provider, or provides an email enabled platform, it’s always good to go back and periodically review your system to ensure nothing was missed and to stay up-to-date on all new recommendations.
A few of the recommendations include the use of the List-Unsubscribe header, publishing a clear WHOIS for domains used for sending mail, and how to process non-delivery report messages.
The List-Unsubscribe header provides an additional way for users to opt-out of email messages. Gmail and Outlook.com both use the presence of the list-unsubscribe header to provide a one-click button to allow the user to unsubscribe from the mailing list. Often enough, if a user cannot find an opt-out link, they’re marking the message as spam. Allowing a recipient to unsubscribe easily is critical to maintaining good delivery reputation.
A WHOIS is query to determine who is the registered user or assignee of a domain name. During a session at the most recent M3AAWG meeting, it was announced that spammers throw away 19 million domains per year. When a postmaster or abuse desk receive a complaint, they’ll often query to see who owns the domain the email was sent from or who owns the domains used in the hyperlinks. If the WHOIS record is out of date or set to private, this limits the ability for the postmaster or abuse desk to reach out to the owner of the domain.
Processing non-deliver reports is critical to maintaining a high delivery reputation. Many ESPs have an acceptable-use-policy that includes a bounce rate. Mailjet recommends a bounce rate of less than 8% and Mandrill recommends less than 5%. If a system is not in place to remove the hard bounces from your mailing list, the sender’s reputation will quickly deteriorate.
The Senders Best Common Practices document can be downloaded at M3AAWG.org.
Reputation is calculated based on actions. Send mail people want and like and interact with and get a good reputation. Send mail people don’t want and don’t like and don’t interact with and get a bad reputation.
Reputation is not
… about who the sender is.
… about legitimacy.
… about speech.
… about message.
Reputation is
… about sender behavior.
… about recipient behavior.
… about how wanted a particular mail is forecast to be.
… based on facts.
Reputation isn’t really that complicated, but there are a lot of different beliefs about reputation that seem to make it complicated.
The reputation of a sender can be different at different receivers.
Senders sometimes target domains differently. That means one receiver may see acceptable behavior but another receiver may see a completely different behavior.
Receivers sometimes have different standards. These include standards for what bad behavior is and how it is measured. They may also have different thresholds for things like complaints and bounces.
What this means is that delivery at one receiver has no impact on delivery at another. Just because ISP A delivers a particular mail to the inbox doesn’t mean that ISP B will accept the same mail. Each receiver has their own standards and sometimes senders need to tune mail for a specific receiver. One of my clients, for instance, tunes engagement filters based on the webmail domain in the email address. Webmail domain A needs a different level of engagement than webmail domain B.
Public reputation measures are based on data feeds.
There are multiple public sources where senders can check their reputation. Most of these sources depend on data feeds from receiver partners. Sometimes they curate and maintain their own data sources, often in the form of spamtrap feeds. But these public sources are only as good as their data analysis. Sometimes, they can show a good reputation where there isn’t one, or a bad reputation where there isn’t one.
Email reputation is composed of lots of different reputations.
Email reputation determines delivery. Getting to the inbox doesn’t mean sending from an IP with a good reputation. IP reputation is combined with domain reputation and content reputation to get the email reputation. IP reputation is often treated as the only valuable reputation because of the prevalence of IP based blocking. But there are SMTP level blocks against domains as well, often for phishing or virus links. Good IP reputation is necessary but not sufficient for good email delivery.
Reputation is about what a sender does, not about who a sender is.
Just because a company is a household name doesn’t mean their practices are good enough to make it to the inbox. Email is a meritocracy. Send mail that merits the inbox and it will get to recipients. Send email that doesn’t, and suffer the repercussions.