Read Emulation is an advanced warmup feature that uses headless browsers to mimic reading warm-up emails like a real human.
It is available to Hyper Growth plan users in the Advanced warmup options:
The read emulation certainly has a positive impact on deliverability as it mimics human behavior. It sends signals to ESPs that your messages are relevant as they will be "read" by the email receiver.
The reason we gave an option to enable/disable this feature is because there are certain third party SMTP providers who have their own tracking analytics system.
In order to keep track of it, these providers insert a tracking pixel. That tracking pixel gets triggered when the Read Emulation feature is enabled and treats the email as a real email.
So, for SMTP providers who don't want warmup emails to affect their tracking analytics, we gave them the option to disable the Read Emulation feature.
Do You Recommend That I Disable Read Emulation?
We noticed this happening with very few third-party SMTP providers, so a few users requested to have the option of disabling the Read Emulation feature. We suggest that you always enable the Read Emulation feature unless you have been instructed otherwise.