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Canonical Name record (CNAME)

Internet standard. A DNS record that maps one hostname in a domain to another hostname instead of an IP address.

To map your custom hostname to the sendgrid.net domain, Twilio needs a CNAME record (canonical name record) that points to sendgrid.net. Twilio uses this CNAME for click and open tracking features. This routes those statistics to your Twilio Email account. This also signs your messages, so your recipients can see your CNAME.

CNAME example

cname-example page anchor
1
NAME                    TYPE   VALUE

2
--------------------------------------------------

3
clicks.example.com.     CNAME  sendgrid.net.