I suspect that some email broadcast vendors (ESPs and MTA providers) struggle with how much inbox placement data to make transparent to their clients (marketers). On one hand, the data is extremely valuable, and it can help marketers and senders understand subscriber satisfaction and optimize inbox placement. After all, if you don't reach the inbox, you don't earn a response.
On the other hand, perhaps sometimes having more data just raises more questions - and questions are a cost center for vendors.
One ESP that serves the small to mid-market is making inbox deliverability data available - with very good results. I spoke with Natalie Nagele at Newsberry about how using this data gives her more ammunition to help marketers follow best practices.
"For one of our clients, we saw a wide variance in open rates across message types. When we exposed the inbox placement data, we realized that some of the marketing messages were simply not reaching the inbox at all," she says.
On the same day a targeted email tips newsletter would achieve 100% inbox rates to domestic ISPs, while a generic even promotion would deliver only 60-80%, she says. The IP reputation was the same based on Sender Score, but clearly there is a difference. "After a month of data review, we concluded that the event promotions were less welcome due to content and low user engagement - as measured by higher complaints," she says.
Nagele worked with the client to improve targeting and relevancy. They asked subscribers to update their email preferences and reconfirmed those in the marketing segment. "The list size for that segment shrank dramatically," she reports, "But open rates went up, as did inbox placement rates. Today, they are delivering between 96-100% across all of their campaigns for domestic ISPs. Those event marketing emails directly represent revenues based on attendance, which went up when people started receiving emails."
Newsberry makes this data available to all clients with a dedicated IP address. "We've found that senders who use and appreciate this data are also willing and interested in taking responsibility for their email delivery," she says. The inbox deliverability tools are included in our monthly plan price, available to small and medium businesses. "They don't need to spend enterprise-level funds to view important delivery data," Nagele says.
Newsberry doesn't offer the inbox delivery monitoring tools (or a dedicated IP address) for those with files smaller than 10,000 subscribers. "Based on conversations with Return Path and our own experience, we've identified 10,000 as a good point where you start building a reputation significant to ISPs," she says.
Of course, if the file is 10K strong, but the mailing frequency is low, that also can harm a sender's ability to build a reputation. "The ideal candidates for a dedicated IP are those with 10,000 or more subscribers who send multiple times a month. We even recommend they split their list and send multiple times per week instead of one campaign (when possible)," she says.
"Those with smaller lists can still depend on Newberry’s overall reputation to maintain high inbox rates," she adds. Most marketers understand that they don't have the volume (or budget) for a dedicated IP, but it still makes them nervous to be on a shared IP. There is a loss of control over their destiny. Certainly, some ESPs have a better reputation with the ISPs, and some vet their clients better than others (and fire them when they exhibit poor sending practices). Until we have widespread domain reputation and authentication, senders must be vigilant to understand who is in their Shared IP neighborhood and thus affecting their reputation and inbox placement.
Many senders (large and small) consider the bounce rate "good enough" for tracking delivery. Of course, bounce rate is not the same as inbox placement, and the two numbers are not necessarily indicative of each other, although they tend to track together. "The way we see it, it's all about your return on investment and time for email marketing," Nagele says.
"If you have inbox rates of 60%, consider yourself throwing 40% of your money and time out the window. Bounces will only show you if you are blocked, at which point your list is already in bad shape. Inbox placement helps you identify much deeper issues where marketers can take direct action," she advises.
For example, she says, a customer learned through tracking inbox results that their single-image emails were getting blocked by Yahoo! and Hotmail (among others). When they changed the text to image ratio, the inbox rates went up, which in turn increased open rates and subscriber response. "How would they have known that if they were only tracking bounces?" she asks.
All senders must take responsibility for their own sender reputation. A good ESP will provide technical support, solid infrastructure and guidance on best practices. But no ESP can make up for poor list hygiene, weak sourcing, high frequency or low relevancy. Sender reputation is a partnership between the email broadcast vendor and the marketer.
"While we think overall IP reputation is really important too," Nagele says, "A good reputation does not guarantee delivery. Getting as much information as possible is the best way to ensure your money is well spent."



