Reference
Emails send untracked until the tracking domain is verified
When you request tracking but the domain's tracking CNAME isn't verified, Emailit now sends the email without tracking instead of rejecting it.
Updated Sep 28, 2026
ChangedOpen & click trackingEmail API
A send request with tracking turned on used to fail with 422 when the sending domain had no verified tracking CNAME. Emailit now accepts the email and sends it without rewriting links or adding the open pixel.
To track opens and clicks, publish the tracking CNAME record for your domain and verify it. See Custom tracking domain.