Reference
Open & click tracking changelog
Changes to Open & click tracking: new features, improvements and fixes.
September 2026
Fixed
Sending domain matching and subdomain settings
Sending domainsEmail APISMTP relayOpen & click trackingInbound email
- The API and SMTP match the
Fromdomain without regard to letter case, soada@Acme.comsends from the verified domainacme.com. - Changing a domain’s tracking or inbound subdomain in the dashboard, or with
tracking_keyandinbound_keyin Update a domain, now saves the new value. Publish the DNS record for the new name and verify it.
- The API and SMTP match the
Changed
Emails send untracked until the tracking domain is verified
Open & click trackingEmail API
A send request with
trackingturned on used to fail with422when 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.
Improved
IP addresses for clicks, loads and unsubscribes
Email logsCampaignsOpen & click tracking
The Loads and Clicks tabs on an email show the IP address of each event, and campaign reports show the latest IP address for each contact who loaded or clicked. Unsubscribes now record and display the IP address too.
See Email details.
Changed
Tracking requires a custom tracking domain
Open & click trackingSending domains
To track opens and clicks, publish a CNAME record from
go.yourdomain.com(or your custom tracking subdomain) togo.emailitmail.comand verify it. The Track loads and Track clicks switches on a domain turn on only after the record is verified.Links and open pixels in emails you sent earlier with shared tracking links keep working. See Custom tracking domain.
December 2025
New
Custom tracking URLs and the Domains rename
Open & click trackingSending domains
Add a CNAME record from
go.yourdomain.comtogo.emailitmail.comto serve tracking links from your own domain, or choose another subdomain with the domain’s tracking key.Sending Domains are now called Domains in the dashboard, and the API endpoint
/v2/sending-domainsmoved to/v2/domains. See Custom tracking domain.