Segment your emails by domain like Gmail or Yahoo, then compare their delivery and open rates. A big gap between domains, say 20% versus 40% opens, signals a deliverability problem worth investigating.
Some emails are successful no matter what when you're doing a warmup, but you have to break 'em down by TLD, like Gmail, Yahoo. So you need to look at the individual percentage of their delivery of their open and click rates. I know open rates are broken, but open rates are still a trend line. So it's still helpful to be able to see that your Yahoo and your Gmail, for example, are almost the same. If you got 20% open rates here and 40% here, you got a delivery problem. That's like the best indication I see always. Subscribe to the pod.
